# The 3rd international conference on particle physics and astrophysics

Europe/Moscow
Hotel Intourist Kolomenskoye 4*

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Description

The 3rd International Conference on Particle Physics and Astrophysics

International Conference on Particle Physics and Astrophysics (ICPPA-2017) will be held in Moscow, Russia, (from the 2nd to the 5th of October). The conference is organized by the National Research Nuclear University “MEPhI”. The aim of the Conference is to share scientific knowledge, to promote contacts between scientists and to develop new ideas in fundamental research. We will bring together experts and young scientists working in experimental and theoretical areas of nuclear physics, particle physics (including astroparticle physics), and cosmology. Most recent results from the modern experiments in these areas and advanced detector technology development will be presented and discussed.

### Please be informed that the conference venue has changed to Hotel Intourist Kolomenskoye 4*.

We are glad to inform you that the registration and abstract submission deadlines were extended. Now the last day for the registration and abstract submission is Monday 4 of September.

Participants
• ABDELLAH Tounsi
• Abeer Elshoukrofy
• Ainur Kunsafina
• Ajaykumar Rai
• Aldiyar Oralbaev
• Alejandro Gutiérrez-Rodríguez
• Aleksandr Kudzhaev
• Aleksandr Rusnak
• Aleksanrd Mefodiev
• Aleksei Popov
• Alexander Bolozdynya
• Alexander Chepurnov
• Alexander Chikhachev
• Alexander Derbin
• Alexander Dolgov
• Alexander Glyanenko
• Alexander Isayev
• Alexander Ivashkin
• Alexander Izvestnyy
• Alexander Khromov
• Alexander Kirillov
• Alexander Kubankin
• Alexander Kumpan
• Alexander Kvashnin
• Alexander Polyarush
• Alexander Shustov
• Alexander Smirnov
• Alexander Starostin
• Alexander vasiliev
• Alexander Zaitsev
• Alexander Zakharov
• Alexandre Kozlov
• Alexey Fomin
• Alexey Grobov
• Alexey Konovalov
• Alexey Kurepin
• Alexey Ogloblin
• Alla Demyanova
• Alla Suvorova
• Almaz Fazliakhmetov
• Anastasia Merzlaya
• Anatoli Butkevich
• Anatolii Serebrov
• Anatoly Smolnikov
• Andrei Kotkov
• Andrey Danilov
• Andrey Reshetin
• Andrey Seryakov
• ANKIT VERMA
• Anna Morozova
• Anna Uryson
• Anton Lukyashin
• Artem Basalaev
• Artem Filatov
• Artemiy Klenin
• Arthur Borodin
• Ayazhan Zhomartova
• Bart Horn
• BIPUL BHUYAN
• Blessed Raphotle
• Boris Chernyshev
• Boris Kerbikov
• Boris Sharkov
• Chao-Ling Hung
• Cherkos Alemayehu
• Chitta Ranjan Das
• Dag Toppe Larsen
• Daniel Froidevaux
• Daniel Murnane
• Daniele Gibin
• Daria Prokhorova
• David Lee WARK
• Denis Derkach
• Dimitrii Krasnopevtsev
• Dmitri Peresunko
• Dmitrii Nesterov
• Dmitriy Korotkov
• Dmitry Akimov
• Dmitry Blau
• Dmitry Denisov
• Dmitry Elumakhov
• dmitry kazakov
• Dmitry Philippov
• Dmitry Rudik
• Doctor Enivweru
• Dragan Hajdukovic
• Eftekhari Samaneh
• Ekaterina Belendryasova
• Ekaterina Esipova
• Elena Bratkovskaya
• Elena Dalbaeva
• Elena Kokoulina
• Elena Kulish
• Elena Solovieva
• Elena Voevodina
• Elizaveta Zherebtsova
• Emmanuel Chauveau
• Erdemchimeg Batchuluun
• Estela A. Garces
• Evgenii Sushenok
• Evgenija Khyzhniak
• Evgeniy Unzhakov
• Evgeny Andronov
• Evgeny Kondratyuk
• Evgeny Soldatov
• Fabio Gargano
• Fabrizio Ferro
• Fedor Guber
• Fedor Ratnikov
• Fedossimova Anastassiya
• Francesco Loparco
• Gioacchino Ranucci
• Giovanni Passaleva
• Gleb Pokatashkin
• Grigory Feofilov
• Grigory Nigmatkulov
• Gulmurod Shoziyoev
• Hamzeh Khanpour
• Hans H. Gutbrod
• Helen Barminova
• Igor Abalakin
• Igor Altsybeev
• Iliya Lagoida
• Ilya Selyuzhenkov
• Iuliia Chudosay
• Ivan Borzov
• Ivan Bredikhin
• Ivan Potashov
• Jose Ruiz
• Joydeep Roy
• Julia Tchemarina
• Katerina Lipka
• Kathleen Whalen
• Kirill Bronnikov
• Konstantin Kuzmin
• Konstantin O. INOZEMTSEV
• Konstantin Postnov
• Kourosh Nozari
• Kristina Naumova
• Kubantai Ernazarov
• kwame appiah
• Kyrill Bugaev
• Laurelle Maria Veloce
• Leonid Dedenko
• Lesya Shchutska
• Liudmila Fesik
• Liudmila Lukianchenko
• Ludmila Malinina
• M. Ayub Faridi
• Mani Tripathi
• Maria Antonova
• Maria HERNANDEZ-RUIZ
• Marina Nurusheva
• Martina Ressegotti
• Maxim Dvornikov
• Maxim Gromov
• Maxim Soloviev
• Mikhail Bogolyubsky
• Mikhail Chaikovskii
• Mikhail Hushchyn
• Mikhail Kirsanov
• Mikhail Naumenko
• MUSA MICHAEL IBRAHIM
• NAOUAL DJOUHRI
• Natalia Di Marco
• Natalia Nazarova
• Nataliya Topilskaya
• Nikita Belyaev
• Nikita Ermakov
• Nikita Pogorelov
• Nikita Smirnov
• Nikolai Gromov
• Nikolay Arsenyev
• Nikolay Karpushkin
• Nikolay Topchiev
• Oleg Golosov
• Oleg Titov
• Olga Dunaeva
• Olga Evdokimov
• Olga Gavrilenko
• Olga Nepochataya
• Olga Solovjeva
• Pavel Logachev
• Pavel Sharov
• Pavel Zarubin
• Peter Senger
• Peter Teterin
• Pietro Antonioli
• Piotr Janus
• Ramil Akbarov
• Roman Mizuk
• Roman Pritula
• Rostislav Konoplich
• Rudolf Samoilov
• Sardana Khristoforova
• Sergei Bolokhov
• Sergei Sinegovsky
• Sergey Ivanov
• Sergey Kholodenko
• Sergey Klimanov
• Sergey Korpachev
• Sergey Mayburov
• Sergey Morozov
• Sergey Rubin
• Sergey Shkarovskiy
• Sergey Ulin
• Sergio Grancagnolo
• Shudhashil Bharthuar
• Shunsuke Honda
• Silvia Martellotti
• Sovan Ghosh
• Sreemanti Chakraborti
• Stanislav Potashev
• Tatiana Leonova
• Tatiana Mamontova
• TATIANA SHCHEDRINA
• Tatsuhiko Ogawa
• Tatyana Shestakova
• Tiziano Camporesi
• Valeriy Klimenko
• Valeriy Nikulin
• Valery Dmitrenko
• Valery Sinev
• Valery Stepanov
• Varvara Batozskaya
• Vasilii Mochalov
• Vasilisa Lenivenko
• Viacheslav Khruschov
• Viacheslav Kulikov
• Victor Berezin
• Victor Perelygin
• Victor Riabov
• Victor Semikoz
• Victor Vorontsov
• Viktar Kireyeu
• Viktar Starastsin
• Viktor Klochkov
• VIRENDRASINH KHER
• Vitalii Okorokov
• Vitaliy Lyamkin
• Vyacheslav Dokuchaev
• Vyacheslav Dyubkov
• Yang ZHANG
• Yaroslav Sagan
• Yashpal Bhulla
• Yaşar Hiçyılmaz
• Yogesh Kumar
• You Zhou
• Youcef BAAMARA
• Yulia Gornaya
• Yuri Bogomolov
• Yuri Kopysov
• Yuri Kovalev
• Yuri Lutostansky
• Yuri Novozhilov
• Yuri Oganessian
• Yuri Pyatkov
• Yuri Stozhkov
• Yury Kudenko
• Yury Smirnov
• Zalak Shah
• Zenischeva Alisa
Support
• Monday, 2 October
• 09:00 10:00
Registration 1h
• 10:00 10:30
Welcome coffee 30m
• 10:30 10:40
Welcome from Organizers 10m Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
• 10:40 12:15
Plenary - 1 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Mikhail Skorokhvatov (MEPhI/NRC KI)
• 10:40
Status of the LHC and plans 35m
• 11:15
Status and results of the Novosibirsk accelerator complex 30m
• 11:45
Recent progress in development of two-phase emission detectors to search for dark matter, novel neutrino physics and double beta-decay 30m
This report reviews recent progress in development of two-phase emission detector technology to search for dark matter, novel neutrino physics and double beta-decay. At the moment the two-phase emission detectors found the best application in the most sensitive at the moment experiments searching for cold dark matter in the form of weakly interacting massive particles (WIMPs). A number of successful experiments arranged by ZEPLIN, XENON, LUX and PandaX collaborations with LXe emission detectors during 10 years period reduced allowed region of existence for WIMPs with mass of 40-50 GeV/c2 from 8.8$\times$10-44cm2 (reported by XENON-10 collaboration in 2006) down to 1.1$\times$10-46cm2 (reported by LUX collaboration at the end of 2016). Detector LZ of the second generation (G2) will be installed at Davis’ cage of the Homestake mine by joint collaboration of former LUX and ZEPLIN experiments and will use 6 ton LXe active mass emission detector in order to reach a sensitivity below 10-47 cm2 for spin-independent WIMP-nucleon interactions. With the increasing detector mass and sensitivity, solar neutrino interactions become an irreducible source of background for WIMP search experiments. Multi-ton active mass WIMP detectors of the upcoming G3 generation shall become, even with naturally occurring isotope abundances, sensitive to double-beta decay at the modern level of sensitivity and solar neutrinos interactions via elastic coherent scattering off xenon nuclei. Detectors of G3 generation such as DarkSide-20k can achieve spin-independent cross sections for WIMPs as low as ~ 7.4$\times$10-48cm2 (6.9$\times$10-47cm2) for WIMPs of 1TeV/c2 (10TeV/c2 ) mass. The RED-100 detector recently constructed at NRNU MEPhI has been constructed for the first observation of the elastic coherent electron neutrino scattering off xenon nuclei when the detector is installed practically on the Earth's surface in vicinity to low energy neutrino source such as NPP nuclear reactor or Spallation Neutron Source. The LBNO (Long Baseline Neutrino Observatory) experiment intends to use large Liquid Argon (LAr) double-phase time projection chamber (DLAr TPC) as one of the detectors. The consortium at CERN is now active in the construction of a large demonstrator LBNO-DEMO DLAr TPC of 3x3x1 m3 active volume. Thus the detector technology invented at MEPhI almost 50 years has demonstrated a great potential to be used in a variety of fundamental research programs.
Speaker: Prof. Alexander Bolozdynya (NRNU MEPhI)
• 12:15 13:30
Lunch 1h 15m
• 13:30 15:10
Plenary - 2 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Mr. Sergei Smirnov (NRNU MEPhI)
• 13:30
Heavy flavour physics with LHCb 35m
Speaker: Mr. Giovanni Passaleva (INFN and CERN)
• 14:05
Heavy Hadron Spectroscopy 30m
I will present recent results of the heavy hadron spectroscopy. They include observation of doubly-charmed baryon, observation of six excited Omega_c baryons and observation of new charmonium level.
Speaker: Dr. Roman Mizuk (MEPhI)
• 14:35
Theoretical review of hep results" 35m
I will present theoretical vision on modern situation in high energy physics and expectations for the new physics beyond the Standard Model
Speaker: Prof. dmitry kazakov (JINR)
• 15:10 18:00
Poster session and coffee&reception Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Alexey Grobov (NRNU MEPhI)
• 15:10
${}^8$He spectroscopy in stopped pion absorption by ${}^9$Be 2h 50m
The ground state of the heavy helium isotope $^{8}$He (J$^{P}$ = 0$^{+}$ ) has the highest ratio of number of neutrons to protons N/Z = 3 among nucleon-stable nuclear states. Excited levels $^{8}$He were observed in several experiments, however, statistics of the results is low. In present work, studies of the level structure of $^{8}$He have been performed in the reaction of stopped pion absorption by $^{9}$Be nuclei. The experiment was carried out at the LAMPF meson factory with a two-arm semiconductor spectrometer of charged particles. The formation of the $^{8}$He was observed in the missing mass spectrum of the reaction $^{9}$Be ($\pi^{-}$, d)X. The advantage of inclusive approach is a high energy resolution (FWHM = 0.4 MeV) in comparison with correlation measurements. The missing mass spectrum in the range (0, 10 MeV) has been described using the superposition of distributions on the phase volumes and the three states of $^{8}$He with the following parameters (Ex, G): (0.1$\times$0.1 MeV, 0.1$\times$0.1 MeV), (3.8$\times$0.2 MeV, 0.3$\times$0.1 MeV) and (4.6$\times$0.3 MeV, 0.3$\times$0.1 MeV). These results have been compared with data of other experimental and theoretical works.
Speaker: Tatiana Leonova (NRNU MEPhI)
• 15:10
A mechanism for galaxy nuclei formation from clusters of primordial black holes 2h 50m
A model describing the formation of protogalaxies is developed. Compact supermassive clusters of primordial black holes assumed to act as a nuclei for the galaxy formation. The mechanism of PBH formation based on a collapse of massive walls of scalar field due to second order phase transition during inflation. Mass spectra of PBH are obtained analytically and shown possibility of the formation of PBH clusters with a total mass of $\sim 10^5-10^8 M_{\odot}$, having a size of $\sim 10$ parsec, in an amount of $\sim 10^{11}$, which corresponds to observational data on the values of galaxies in the visible Universe. The primary fractal structure of galaxies is naturally explained through the mechanism. Proposed approach is the cornerstone for a principally new scenario of the galaxy formation in the early Universe.
Speaker: Valeriy Nikulin (NRNU MEPhI)
• 15:10
A telescope for astroparticles with nuclear interactions above $10^{15}$ eV 2h 50m
A telescope for astroparticles with nuclear interactions above $10^{15}$ eV is proposed. Recent progress in the fiber-optic technique offers a real opportunity for a high-mountain detector to investigate singular nuclear interactions at energies > $10^{15}$ eV. Given the telescope area of 1000 $m^{2}$, the year exposition would give a few events at $10^{16}$ eV and a few hundred above $10^{15}$ eV. Event recording is supposed to be based on CCD sensors.
Speaker: Prof. Oleg Dalkarov (LPI)
• 15:10
Analysis of anisotropic transverse flow in Pb-Pb collisions at 40AGeV in the NA49 experiment at CERN SPS using Qn-Corrections Framework 2h 50m
Anisotropic transverse flow is one of the most important observables in a study of matter produced in ultra-relativistic nucleus-nucleus collisions. Detector acceptance non-uniformity in the transverse plain introduces substantial bias in the flow analysis dictating the need for applying specific corrections. In this poster, the results of flow analysis in Pb-Pb collisions at the beam energy of 40 AGeV recorded with the fixed target experiment NA49 at CERN SPS are presented. Three-subevent technique is used for the differential measurements of the directed and elliptic flow. Corrections for the detector acceptance anisotropy in the transverse plane are applied using extension of the Qn-Corrections Framework developed originally for the ALICE experiment at the LHC. The results are compared with those previously obtained by STAR at RHIC and the NA49 at CERN SPS collaborations. In the future, the developed procedure will be used for the analysis of the new Pb-Pb data collected by the NA61/SHINE experiment at CERN SPS.
Speaker: Mr. Oleg Golosov (NRNU MEPhI)
• 15:10
Angular correlations with charmed hadrons in the Monte-Carlo model with string repulsion 2h 50m
Recent experimental results revealed large elliptic flow of the charmed hadrons at LHC energies. These measurements are often interpreted using transport models, which incorporate dissociation and recombination mechanisms for charm quarks. In this report, a modified version of the Monte Carlo model with string repulsion was used to calculate rapidity and azimuthal correlations with charmed hadrons. The string repulsion mechanism may provide significant angular correlations and can be considered as an alternative to thermalization picture.
Speaker: Igor Altsybeev (St.Petersburg State University)
• 15:10
Calculation and measurement of Ce-Pr-144 beta spectrum 2h 50m
We calculate beta spectrum of $^{144}$Ce-$^{144}$Pr source taking into account several types of corrections. The result is compared with the experimental data obtained at NRC “Kurchatov Institute”. Based on this comparison, we estimate the reliability of theoretical calculations for electron and antineutrino spectra from beta decay.
Speaker: Mr. Oleg Titov (NRC "Kurchatov Institute")
• 15:10
CeSOX: An experimental test of the sterile neutrino hypothesis with Borexino 2h 50m
The third phase of the Borexino experiment that’s referred to as SOX is devoted to test the hypothesis of the existence of one (or more) sterile neutrinos at a short baseline (~5-10 m). The experimental measurement will be made with artificial sources namely with a $^{144}$Ce-$^{144}$Pr antineutrino source at the first stage (CeSOX) and possibly with a $^{51}$Cr neutrino source at the second one. The fixed $^{144}$Ce-$^{144}$Pr sample will be placed beneath the detector in a special pit and the initial activity will be about 100-150 kCi. The start of data taking is scheduled for April 2018. The presentation gives a detailed description of the preparation for the first stage and shows the expected sensitivity.
Speaker: Mr. Maxim Gromov (SINP MSU)
• 15:10
Charge-Exchange Resonances of Tin Isotopes 2h 50m
Charge-Exchange Resonances of Tin Isotopes Yu. S. Lutostansky National Research Center "Kurchatov Institute", Moscow, 123182 Russia Lutostansky@yandex.ru Charge-exchange resonances: the giant Gamow–Teller (GTR [1]) and analog (AR) resonances, and the so-called “pigmy” resonances (PR), which are lying below GTR [2], have been studied in the self-consistent theory of finite Fermi systems (TFFS). Microscopic numerical calculations and semi-classical calculations are presented for nine tin isotopes with the mass numbers 112, 114, 116, 117, 118, 119, 120, 122, and 124, for which experimental data exist [3]. These data is from Sn(3He,t)Sb charge-exchange reaction at the energy (3He) = 200 MeV. The giant Gamow-Teller and analog resonances with the energies – EG and EA, respectively, dominate in the strength function of the charge-exchange excitations of atomic nuclei. The calculated energy difference ΔEG−A = EG − EA tends to zero with A in heavy nuclei indicating the restoration of Wigner SU(4)-symmetry. The calculated ΔEG−A values are in good agreement with the experimental data. The average standard rms deviation for GTR and AR energies is δE ≤ 0.30 MeV for the 9 considered Sn nuclei that is close to the experimental EGTR errors. The comparison of calculations with experimental data on the energies of charge-exchange pigmy resonances gives the standard deviation δE < 0.40 MeV for microscopic numerical calculations and δE < 0.55 MeV for calculations by semi-classical formulas, which are comparable with experimental errors. These calculations are original. The strength function of the beta decay for the 118Sn isotope has been calculated. It has been shown that the calculated resonance energies are close to the experimental values. The calculated and experimental relations between heights of pygmy resonance peaks are also close to each other. The same methods were used to calculate the resonance structure of other nuclei and the results of calculations showed good agreement with the experimental data. Of particular interest are the short-lived neutron-rich nuclei. The appearance of a pigmy resonance in the energy window of the beta-decay leads to a sharp decrease of the nucleus half-live. And when the pigmy resonance appears in the window of the beta-delayed neutron emission or beta-delayed fission, the corresponding probabilities increase strongly. This was recently observed in an experiment of studying the emission of delayed neutrons in highly neutron-rich gallium isotopes [5]. The work is supported by the Russian RFBR grant 16-02-00228 and RSF project 16-12-10161. 1. Yu. V. Gaponov, and Yu. S. Lyutostanskii. JETP Lett. 15, 120 (1972). 2. Yu. S. Lutostansky. JETP Lett. 106, 7 (2017). 3. K. Pham, J. Janecke, D. A. Roberts, et al. Phys. Rev. C 51, 526 (1995). 4. D. Verney, D. Testov, F. Ibrahim, Yu. Penionzhkevich, et al. Phys. Rev. C 95, 054320 (2017).
Speaker: Prof. Yuri Lutostansky (Kurchatov Institute)
• 15:10
Conserved charges as a manifestation of extra space symmetries 2h 50m
Non gauge symmetries like baryon one are usually connected with some internal symmetries. It is not clear up to now whether these symmetries have took place from the beginning or they were formed in the early Universe. On the other hand, the idea of extra space almost inevitably leads to charge non conservation. Indeed in the framework of multidimensional gravity observed low energy symmetries are the consequences of isometries of extra space. It is assumed that there are no any Killing vectors of a nucleated manifold in the very beginning. The first stage of an extra space formation consists of its symmetrization. Hence, there are no conserved charges at this stage. Charge conservation appears much later when the extra space geometry acquires appropriate Killing vectors. The situation is similar to those concerning the problem of baryon asymmetry. In the present paper we consider a mechanism of the baryon asymmetry generation accompanied by symmetrization of extra space. It is assumed that the baryon symmetry (asymmetry) is the consequence of symmetry (asymmetry) of extra space. The corresponding symmetry of the theory is restored during the process of evolution at later stages.
Speaker: Prof. Sergey Rubin (MEPhI)
• 15:10
Constrains on the model of dark matter with Coulomb-like interaction explaining positron anomaly 2h 50m
It is often supposed that dark matter possesses own interaction in particular like Coulomb. It leads to inhacement of annihilation in Galaxy what helps to explain cosmic ray anomalies, e.g. positrons. We put constrains on such model coming from CMB, hot dark matter abundance and also outline parametr region where classical approach is relevant for description of annihilation through bound state formation. The given constrains are applied to dark disk model.
Speaker: Mrs. Ekaterina Esipova (NRNU MEPhi)
• 15:10
design, optimization and construction of triplet RETGEM nuclear detector using artificial intelligent systems 2h 50m
Today, Gas Electron Multipliers (GEMs) like detectors are widely used in a variety of applications from medical and industrial applications to high precision experiments in Large Hadron Collider (LHC). According to this wide range of usage of GEM like detectors and their developments, improving the robustness and gain level of them attract a lot of interests. The aim of this paper is to design and to manufacture the first triplet RETGEM nuclear detector by using artificial intelligent systems. Adding the layers of the detector, from single RETGEM to triplet one and choosing the proper range of parameters reduces the electrical discharge probability and so we would achieve the higher gain levels. We use the Printed Circuit Boards (PCB) as the basic part of RETGEM layers and then cover them using a thin layer of graphite as a resistive conductor. In the next step, the container bulk and electrical parts have been manufactured. The electrical part of the detector is a Charge Sensitive Amplifier (CSA), which it amplifies the results and filters the noises. The measurements by the manufactured RETGEM nuclear detectors shows that the triplet RETGEM filled by mixture gasses of Ar-CO2 with 80-20 percentage can achieve to the gain levels up to 10 million while the gain level of a single RETGEM in the same condition rises up to 0.1 million. We also show that the probability of electrical discharge will be reduced in gas mixtures pressures in the range of 1.5 to 2 Bar.
Speaker: Dr. mansour farhadi (young researchers and elite club, bandar abbas branch, islamic azad university)
• 15:10
Detection of tensor and scalar gravitational waves by means of interferometric antennas 2h 50m
There is presented a new method for the determination of a polarization state of an incoming gravitational wave (GW) by means of a network of three and more working interferometric antennas when the source localisation is known. The recent announcement 1st August 2017 about the start of the new observation run with three interferometric antennas of LIGO-Virgo Collaboration opens a new possibility for the study of the fundamental physics of the gravitational interaction. Modern gravitational theories predict the existence of several polarization states of gravitational waves including scalar and tensor modes, which can be recognised by this method using the difference in beam patterns of interferometric antennas. Therefore, this method distinguishing between polarization modes provides a new test on a theory of gravitation.
Speaker: Ms. Liudmila Fesik (PhD student)
• 15:10
Development of dark disk model 2h 50m
We consider the model of dark matter (DM) where it is supposed that there are two DM components: "active" subdominant one, which forms a disk in Galaxy and gives cosmic ray signals (due to DM annihilation or decay), and "passive" dominant component forming halo. This model was suggested by us earlier and first analysis have been done. Here we present an upgrade where we take into account new cosmic ray data and try new decay/annihilation modes.
Speaker: Mr. Maxim Soloviev (NRNU MEPhI)
• 15:10
Development of the reactor antineutrino detection technology within the iDream project. 2h 50m
The iDream (industrial Detector for reactor antineutrino monitoring) project is aimed for remote control of the operating modes of the atomic reactor on nuclear power station and to ensure a technical support of IAEA non-proliferation safeguards. The detector is a scintillator spectrometer. The sensitive volume (target) is filled with a liquid organic scintillator based on linear alkylbenzene where reactor antineutrinos will be detected via inverse beta-decay reaction. We present first results of laboratory tests after physical launch. The detector was deployed at sea level without background shielding. Number of calibrations with radioactive sources were conducted.All data was obtained by means of a slow control system which was put into operation.
Speaker: Aldiyar Oralbaev (Kurchatov institute)
• 15:10
Digital pulse shape discrimination between fast neutrons and gamma rays with para-terphenyl scintillator 2h 50m
Registration of fast neutrons against the background of gamma radiation is an important task both for the case of low particle intensity (measurement of the neutron and gamma background in neutrino and dark matter particle detectors, environmental monitoring) and the case of high neutron and gamma-ray fluxes (neutron flux from neutron generators and particle accelerators, control of spent nuclear fuel). To detect fast neutrons, scintillation detectors with organic scintillators are used. In such scintillators, two components of de-excitement are present: the fast and the slow. Intensity of the slow component in such scintillators depends on the type of particle detected. In the presented work, we investigated several digital methods of signals from fast neutrons and gamma quanta discrimination. The experimental setup consists of a Pu-Be neutron source, a scintillation detector with an organic para-terphenyl monocrystal, and a digitizer (CAEN DT5730, 500 MHz). Mixed waveform sequences were saved and then separated by pulse shape. Four methods used for signal separation are described. A new method of Figure of Merit (FOM) calculation is presented. Comparison of the traditional and the new methods of FOM calculation is given. In our setup, for the minimum threshold value FOM = 1.5 was obtained, while for the known BC-501A liquid scintillator FOM≈1. Neutron detector with a para-terphenyl crystal is used for measuring neutron yield in the neutron generator that is now being developed using carbon nanotubes. The work is performed with financial support of the Ministry of Science and Education of Russia, the Project no. 14.578.21.0192 (RFMEFI57816X0192).
Speaker: Mikhail Kirsanov (MEPhI)
• 15:10
Effect of viscosity on propagation of MHD waves in astrophysical plasma 2h 50m
We determine the general dispersion relation for the propagation of magnetohydrodynamic (MHD) waves in an astrophysical plasma by considering the effect of viscosity with an anisotropic pressure tensor. Basic MHD equations have been derived and linearized by the method of perturbation to develop the general form of the dispersion relation equation. Our result indicates that an astrophysical plasma with an anisotropic pressure tensor is stable in the presence of viscosity and a strong magnetic field at considerable wavelength.
Speaker: Mr. Cherkos Alemayehu (Addis Ababa University, Institute of Geophysics Space Science and Astronomy)
• 15:10
Elliptic flow of negatively charged pions measured with the event plane method in Pb-Pb collisions at 40AGeV by the NA49 experiment at CERN SPS 2h 50m
A hot and dense matter is produced in heavy-ion collisions at relativistic energies. Anisotropic expansion of this matter result in the momentum asymmetry of the particle production relative to the reaction plane, a so called azimuthal anisotropic flow. In this poster, the measurement of the elliptic flow for negatively charged pions in inelastic Pb-Pb collisions at the beam energy of 40 AGeV obtained with the fixed target experiment NA49 at CERN SPS are presented. Results are compared with measurements at similar energies by the STAR experiment at RHIC. Elliptic flow is measured using the event plane method. Event plane angle and the negatively charged pions are reconstructed using particle's tracks and energy loss measurement in the Time Projection Chamber (TPC). In the future, these results will be used as a reference for flow measurements from the lead ion energy scan program of the NA61/SHINE experiment at CERN SPS.
Speaker: Ms. Yulia Gornaya (NRNU MEPhI)
• 15:10
Estimation of non-femtoscopic effects in p+p and p+A collisions at RHIC energies using PYTHIA and HIJING generators 2h 50m
The spatial extents of particle emission source in high-energy collisions can be measured using two-particle femtoscopic correlations. In collisions with small multiplicities, such as proton-proton collisions, correlation functions can be distorted by non-femtoscopic effects, for example correlations caused by energy-momentum conservation laws, jets and mini-jets. To estimate these effects, a simulation of p+p collisions at $\sqrt{s}$=200 and 510~GeV using PYTHIA and HIJING generators and p+Au collisions at $\sqrt{s_{NN}}$=200~GeV using HIJING were performed. In this talk, we will present charged pion and kaon correlation functions obtained from the Monte Carlo generators and their comparison to the experimental data.
Speaker: Ms. Evgenija Khyzhniak (National Research Nuclear University MEPhI)
• 15:10
Excited $\Xi_c$ Baryon Decays via $\gamma$ and/or $\pi$ Emission 2h 50m
The $\Xi_c$ states consist of a combination of a charm quark, a strange quark, and an up or down quark. The ground-state $\Xi_c^0$ and $\Xi_c^+$ are the only members of the group that decay weakly, and their masses, lifetimes, and many of their decay modes have been measured. The $\Xi_c$ states also exist in many angular momentum configurations of the constituent quarks, each as an isospin pair. These excited states have been found to decay either electromagnetically or strongly in three different general types of decay: to the $\Xi_c$ ground states together with mesons and/or photons, to final states that include a $\Lambda_c^+$ and a kaon, and to $\Lambda D$ final states. The talk will cover recent measurements of the masses and widths of the excited $\Xi_c$ baryons that include a ground-state $\Xi_c$ in their decay chain. All five pairs under investigation have previously been discovered, but in general their masses and intrinsic widths have not been measured precisely.
Speaker: Elena Solovieva (MIPT, LPI RAS)
• 15:10
Extension of the space experiment "GRIS" onboard the ISS capabilities: registration of short gamma-ray bursts and TGF 2h 50m
The GRIS device is a wide-range (0.05-10.00 MeV) multi-detector X-ray and gamma radiation spectrometer, intended for the study of solar flares. The unique capabilities of the detector, based on the CeBr3 crystal (very short flashing time) allow us to expand the range of problems solved in the "GRIS" experiment. In addition to registering solar flares that have characteristic times per minute, this detector allows solving problems in identifying and recording characteristics of geophysical and astrophysical events (short gamma-ray bursts and terrestial gamma-ray flares - TGF) in the time range of 10 μs-1 ms. The modification of the hardware of the GRIS device for solving these problems is described and discussed in this paper.
Speaker: Dr. Alexander Glyanenko (NRNU "EPhI")
• 15:10
Forward Yields of the Secondary Light Nuclei in CC-collisions at Beam Energy 20.5 GeV/n on the Accelerator U-70 in Comparison with Models UrQMD, FTFP BERT EMV and QGSP FTFP BERT EMV in the Framework of GEANT4 2h 50m
Measured forward Yields of the secondary light nuclei in CC-collisions at beam energy 20.5 GeV/n on the accelerator U-70 are presented. The beam line number 22 was used as spectrometer of the secondary fragments. For detection of particles on its output and measureing of their characteristics the equipment of modified two arms spectrometer FODS2 was activated, where one of arms was set at zero angle relatively to the channel axis. The measurements were carried out on forward cone within the polar angle of produced particles from 0 to 7 mrad. Rigidity (P/Z) of the channel was varied in the experiment from 7 to 70 GeV/c. The obtained results are compared with models UrQMD, FTFP_BERT_EMV and QGSP_FTFP_BERT_EMV in the framework of GEANT4. This work was supported by grant N 16-02-0021 from the Russian Foundation Research.
Speaker: Dr. Mikhail Bogolyubsky (National Research Center "Kurchatov Institute" Institute for High Energy Physics, Protvino, Russia)
• 15:10
GEM tracking system of the BM@N experiment 2h 50m
BM@N (Baryonic Matter at the Nuclotron) is the fixed target experiment aimed to study nuclear matter in the relativistic heavy ion collisions at the Nuclotron accelerator in JINR. Detectors based on Gas Electron multipliers (GEM) have been identified as appropriate for the BM@N tracking system, which is located inside the BM@N analyzing magnet. The structure of the GEM detectors and the results of study of their characteristics are presented. The GEM detectors are integrated into the BM@N experimental setup and data acquisition system. The performance of the GEM tracking system in the first technical run with the deuteron beam is shortly reviewed.
Speaker: Elena Kulish (JINR)
• 15:10
Gravitational gamma-resonance spectrometry of long-lived isomers and the possibility of its application for study of subtle gravitational effects 2h 50m
Messbauer effect – the emission/absorption of gamma-quantum with the momentum transfer of the impact to the kernel source/absorber and the crystal as a whole, allows, among other things, to study gamma line of long-lived isomers[1]. Theoretically, the natural width of/the gamma line of the kernel is determined by the ratio of $\Gamma_{natur} = \hbar/\tau$, where $\hbar$ - Planck's constant divided by $2\pi$ , $\tau$ - the average lifetime of nuclear level (line). The isomer $^{109m}Ag$ emits gamma line with $E_{\gamma} = 88.03 \cdot 10^3$ eV and $\tau = 57.7$ sec. Natural width of this line is $\Gamma_{natur} = 1.14\cdot10^{-17}$ eV. The isomer $^{103m}Rh$ emits gamma line with $E_{\gamma} = 39.75\cdot10^3$ eV and $\tau = 80.9$ [2, 4, 5]. Natural width of this line of $\Gamma_{natur} = 1.3\cdot10^{-19}$ eV, which is nearly $85$ times more than the the investigated silver[1]. In the case of studying the gamma resonances of the long-lived isomers with the measurement of the shape resonance by scanning of the peak of resonance absorption of gamma-line Doppler shift method is very difficult, because it would take the device generates the speed of the source relative to the absorber $\propto10^{-12}-10^{-13}$ $cm/sec$ that cannot a mechanical device. If the gamma quantum moves in the gravitational field and the point of emission and absorption have the height difference $\Delta h$ , it will have a shift of energy at the point of absorption relative to its energy at the point of emission $\Delta E_{\gamma} = E_{\gamma} g \Delta H / c^2$ , where $E_{\gamma}$ - is the energy of the gamma quantum at the point of emission, $g$ - is the gravitational acceleration, $\Delta h$ - is the difference between points of emission and absorption, c - is the speed of light. The typical difference in height to shift the energy of the gamma quantum on the value of the width of the resonance peak of long-lived isomers $^{109m}Ag$ and $^{103m}Rh$ will be $\propto10^{-4}-10^{-3}$ cm, which is easy possible. Experimental measurement of the natural width of the gamma-resonance peak of the isomer $^{109m}Ag$ is $\propto10^{-17}$ eV [1]. The expected natural width of the gamma resonance of $^{103m}Rh$ must be $\propto10^{-19}$ eV [1, 2]. This means that experimentally establish at resonance, the energy applied to the experimental setup width of the resonance peak scale can partially or completely disrupt resonant conditions. $\Delta E_{\gamma}/E_{\gamma}$ will be $\propto10^{-22}$, typical height difference $\Delta h$, needed to shift the energy of the gamma quantum on the width of the resonance peak of long-lived isomers are micrometers. To the same energy shift causes a change in the gravitational potential $\Delta g_{\gamma}/g \propto 10^{-13}$ [3]. This evaluation of the sensitivity of the gravitational gamma-ray spectrometer for weak gravitational interactions. References: 1. Davydov A. V."Advances in gamma ray resonant scattering and absorption ". Springer. Springer tracts in modern physics 261. 2015. 2. Davydov A.V., Isaev Yu. N., Kalantarov V. D. // Gravitational gamma-ray spectrometer for studying gamma resonance of long-lived isomer 103mRh. ANRY (Apparatus and News of Radiation Measurements), No 4, 2016, p. 31. 3. Davydov A.V., Isaev Yu. N., Korotkov M. M., // The Gravitational gamma-resonance spectrometry of long-lived isomers and the possibility of its application for study of subtle gravitational effects. Preprint ITEP 7-16. 2016. 4. The recommendations of the ICRP. Diagrams of the decays of radionuclides. The energy and intensity of radiation in 3 books. Book 2. Part 1. p. 66. M. Energoatomizdat.1987 5. The recommendations of the ICRP. Diagrams of the decays of radionuclides. The energy and intensity of radiation in 3 books. Book 2. Part 1. p. 18. M. Energoatomizdat.1987.
Speaker: Mr. Yuri Novozhilov (Institute Theoretical and Experimental Physics. NIC "Kurchatovskiy Institute")
• 15:10
Imaging Atmospheric Cherenkov Telescope for the TAIGA experiment 2h 50m
Study of cosmic ray (CR) sources is one of the most important tasks of astrophysics. The charged component of CR does not give such an opportunity because of the trajectory deviation in the interstellar magnetic fields. Therefore, gamma-ray astronomy plays an important role, since gamma-rays occur simultaneously with CR, but do not deflect in magnetic fields and can be relatively easily detected in the ground-based setups. Gamma astronomy made a powerful breakthrough in the GeV and TeV energy ranges over the past decade. However, important questions remain open, such as the observation of PeVatrons – CR sources in the Galaxy, where gamma quanta with energies more than 100 TeV may be generated. This subject is essential for the CR acceleration mechanism explanation. An experimental setup of a new generation is created in the TAIGA collaboration. This is a complex of detectors of various types designed to measure extensive air showers (EAS), and is located in the Tunka valley, 50 km from the Lake Baikal. In addition to the muon and wide-angle Cherenkov optical detectors HiSCORE, it is proposed to construct up to 16 IACTs (Imaging Atmospheric Cherenkov Telescope). The IACT, which measures EAS together with other detectors, will improve the sensitivity of all complex of detectors. The first IACT has been operating in the test mode since 2016. Debugging of the telescope control system and the data processing algorithms are continuing. The second telescope is being manufactured at JINR and will begin to work in Tunka at 2018. Also JINR is developing a technology for IACT mirror facets manufacturing, which will make possible to reduce the cost of manufacturing. The poster will present the IACT main technical parameters, examples of events, as well as the second IACT status of production, including the mirror facets production.
Speakers: Mr. Arthur Borodin (JINR, Dubna) , Yaroslav Sagan (DLNP, JINR)
• 15:10
Improving of RPC for Muon System of CMS experiment 2h 50m
By 2027, the Large Hadron Collider luminosity should increase from 1.5 × 10^34 cm−2 s −1 to 5 × 10^34 cm−2 s −1. For this purpose two more long shutdown periods are scheduled to give the machine and the experiments the necessary time to anticipate these luminosity increases: Long Shutdown 2 (LS2) in 2018/2019 and Long Shutdown 3 (LS3) in 2023/2025. During these long shutdown periods the CMS Collaboration intends to upgrade several subsystems. In particular, the muon system of CMS detector will be extended in both Endcaps to ensure efficient muon triggering and reconstruction in that region at high luminosities. In the Endcap regions, CMS detector is using Cathode Strip Chambers (CSCs) as muon tracking and trigger detectors and Resistive Plate Chambers (RPCs) serve as dedicated trigger detectors and improve the muon reconstruction by providing the excellent timing resolution for identification muon particles. At the present, the four Endcap discs are not fully equipped: RPCs are missing completely and cover only Endcap disks up to |η| = 1.6. During LS3 these Endcap stations will be instrumented further with new RPCs and Gas Electron Multiplier detectors which will be cover the region of 1.8 <|η| < 2.4. Nowadays, the final design of RPC chambers is developed and the prototypes of double- gap RPCs with gap thickness of 1.4 mm are tested. Study of the main parameter of improved RPC such as: detection efficiency, cluster size, rate capability and so on are performed in Gamma-radiation Facility (GIF++) at CERN with high radiation environment. In this work the GIF++ short description and main results obtained during the test will be presented.
Speaker: Ms. Elena Voevodina (Universita’ degli Studi di Napoli Federico II and INFN sezione di Napoli)
• 15:10
Influence of hadronic interaction models on characteristics of the high-energy atmospheric neutrino flux 2h 50m
The results for the high-energy conventional atmospheric neutrino fluxes calculated with usage of hadronic interaction models (QGSJET, SIBYLL, EPOS-LHC) display appreciable discrepancy supposedly due to difference in predictions of kaons production in nucleon-nucleus collisions. Above $100$ TeV calculated spectra of muon neutrinos show the apparent dependence on the spectrum and composition of primary cosmic rays around to the knee. At energies above $1$ PeV additional uncertainties appear due to production of charmed particles and also from the high-energy models of primary cosmic ray spectra which imprint on the prompt neutrino flux. Basing on this calculation we study the influence of hadron-nuclear interactions on the neutrino-to-antineutrino flux ratios $\nu_{e} / \bar \nu_{e}$, $\nu_{\mu} / \bar \nu_{\mu}$ and the neutrino flavor ratio $(\nu_{\mu}+\bar \nu_{\mu)} / (\nu_{e}+\bar \nu_{e})$. These neutrino flux characteristics are sensitive to $\pi^{+} / \pi^{-}$, $K^{+}/K^{-}$ and $\pi/K$ ratios, depending on cross-sections of the meson production in $hA$-collisions. The cosmic-ray composition due to $p/n$ ratio also affects the hadronic cascade evolution and neutrino ratios. The comparison of predicted neutrino spectra with the latest exprimental data justifies reliability the performed computation which correctly describes in whole the atmosheric neutrino production. Atmosperic muon neutrino spectra, calculated with use of Kimel-Mokhov, SIBYLL 2.1 and EPOS LHC hadronic models, are consistent with the experimental results. At energies $1−500$ TeV curves calculated for these modeles combined with Hillas-Gaisser cosmic-ray spectrum, are close to the best fit of IceCube. Calculations of the flavor ratio using SIBYLL 2.1 and QGSJET ll agree well with only experimental point at 1.7 TeV derived in IceCube experiment.
Speaker: Ms. Anna Morozova (Moscow State U.)
• 15:10
Initial state fluctuations and complete destruction of the projectile nucleus in interactions of asymmetric nuclei at high energies 2h 50m
A study of characteristics of the events of complete destruction of the projectile nucleus in the interactions between asymmetric nuclei for different initial states of the collision, is performed. For experimental studies of nucleus-nucleus interactions in this work, we applied the method of nuclear emulsions. Main distributions of secondary particles for the individual events of complete destruction of the projectile nucleus, are considered. A comparative analysis of average characteristics of similar distributions of secondary particles, is implemented. In the interactions of the sulfur nuclei with heavy emulsion nuclei at energy 200 AGeV, anomalous high number of events the complete destruction of the projectile nuclei, is observed. They have the following distinctive peculiarities. The probability of such events depends on the energy of interaction (they are not detected in the interactions between the sulfur nuclei with emulsion nuclei at energy of 3.7 AGeV) and the degree of asymmetry of the interacting nuclei (they are not detected in interactions of heavy nuclei with nuclei of photoemulsion). These events are characterized by high multiplicity of secondary particles and narrow angular distribution at large angles (they have narrow peak in the region of small values of average pseudorapidity).
Speaker: Mrs. Fedossimova Anastassiya (Institute of Physics and Technology)
• 15:10
Investigaion of WLS on LAr ITEP test chamber 2h 50m
Liquid argon (LAr) is widely used in experimental physics as a scintillator. The disadvantage of LAr is the short wavelength of scintillation light. The most popular way of wavelength shifting (WLS) is the use of tetraphenyl butadiene (TPB). The experimental study with the LAr test chamber is carried out at ITEP now in order to improve the light collection efficiency and the time characteristics of LAr scintillator by using TPB and Xe-doping to LAr simultaneously. Preliminary results of this study are presented in this poster.
Speaker: Olga Nepochataya (MEPhI)
• 15:10
Local heating of the Universe by the Higgs field 2h 50m
We consider a possible regions in the Universe with different chemical composition, temperature, inner structure formed due to Higgs field interaction with a scalar field. If Higgs field (h) interacts with other scalar field (phi) with two vacua: true (< phi >) and false < phi' >, then due to interaction of this field with Higgs the latter may have different v.e.v., < h > and < h' >, depending on the vacuum of phi. Region of the false vacuum of the field phi, formed in the early Universe, is surrounded by domain wall which starts to collapse at some moment, when the temperature of matter T. It may lead to primordial black hole formation (PBH). Also when the particles intersect domain wall they change their mass since Higgs v.e.v. changed. If < h0 >>< h >, then the mass is diminished, extra energy is released, the region is heated. If T ~ 1-100 keV (soon after Big Bang nucleosynthesis), the considered region is order of galactic scale, and inside it and in its vicinity chemical composition should alter due to energy release. So in this scenario objects of galactic scale may appear with abnormal chemical composition, temperature, structure. Here we discuss it.
Speaker: Prof. Sergey Rubin (MEPhI)
• 15:10
Mass spectra of Bottomonia using relativistic corrections to the potential 2h 50m
We compute the masses of different states of bottomonia in the framework of potential non-relativistic QCD (pNRQCD), non-perturbatively. The potential consists of two terms, a static term incorporating Coulombic plus confinement part along with a constant and a relativistic correction term classified in powers of the inverse of heavy quark mass \textit{O}$(1/m)$. The \textit{O}$(1/m)$ Spin dependent corrections are incorporated to compute the singlet and the triplet states of bottomonia. The Schr\"{o}dinger equation is solved numerically to obtain the masses from 1S to 6S states, the calculated masses for ${{\mathit \eta}_{{b}}{(1S)}}$ is $9.390$ GeV and for ${{\mathit \Upsilon}{(1S)}}$ is $9.459$ GeV and is found to be in good accordance with the experimental results.
Speakers: Dr. Ajay Kumar Rai (Sardar Vallabhbhai National Institute of Technology-Surat, Gujarat, India) , Mr. Raghav Chaturvedi (Sardar Vallabhbhai National Institute of Technology-Surat, Gujarat, India)
• 15:10
Mass-Spectrum of Charged Leptons from the Planck Mass 2h 50m
Masses of elementary particles are considered as fundamental constants. Modern physics believes these masses could be calculated from more fundamental mass scale, e.g., the Planck mass. However, a relation between mass-spectrum of charged leptons and the Planck mass is still unknown. Here we show a way to derive the mass-spectrum of electron, muon, and tau-lepton from the Planck mass.
Speaker: Dr. Andrei Kotkov (Lebedev Physical Institute of RAS)
• 15:10
Mathematical model of dynamic detector system for detecting Cherenkov light from EAS 2h 50m
Creating a new architecture of detection system for measurements of different characteristics in astrophysics and cosmic rays detection opens new era in science. Using the latest technologies related to multicopter cluster systems, alternative energy sources, cluster technologies, cloud computing and big data is efficient way to open new ways of research. Quick-deploy scalable dynamic system of controlled drones with a small set of different detectors for the detection of various components of extensive air showers (EAS) in cosmic rays is very attractive. We present a mathematical model for such dynamic system for N - dedrons (detecting drones) for detecting Cherenkov light from EAS and fluorescent light.
Speaker: Dr. Gulmurod Shoziyoev (LPI RAS)
• 15:10
Measurement of muon flux in the Canfranc Underground Laboratory 2h 50m
Residual flux of high energy cosmic muons in Canfranc Underground Laboratory (LSC) was measured by the Muon Monitor developed especially for this goal. It is a three-layer assembly of the matrix of fast SC16 scintillation detectors. The monitor has an effective square aper ture of 1 m2 and angular aperture ≈ 80°. Rare muon signals are selected from prevailing gamma ones by means of triple coincidence technique and tracking analysis. Calculation of monitor apparatus function and analysis of experimental data was carried out by means of Monte Carlo simulation. Muon flux of $4.7±0.4 m^{−2} s^{−1}$ has been obtained for LAB2400 (Hall A) of the LSC.
Speaker: Mr. Almaz Fazliakhmetov (Moscow Institute of Physics and Technology, Institute for Nuclear Research of the Russian Academy of Sciences)
• 15:10
Measurements of the beam and target analyzing powers and spin correlation parameter Ann in elastic pp scattering at 45 Gev/c. 2h 50m
We proposed the experiment for measuring the spin observables, Ab, At and Ann in elastic pp scattering by using the both normally polarized proton beam and target at momentum p = 45 GeV/c. Such study will allow us to test experimentally the equality of polarization P to analysing powers AN. This equality was theoretically proved and widely used for extraction the polarization observables with unpolarized beam and polarized target. The polarization and analysing power at high energy are rapidly decreasing. Therefore, the recoil proton polarization was measured by using the double scattering schema. For determination P, An and Ann one needs to use the polarized beam and polarized target in the one scattering schema. But such experiments are very scarce. There are no the experimental data on the spin correlation parameter Ann in diffractive region at the momentum more than 12 GeV/c.
Speaker: Ms. Marina Nurusheva (NRNU MEPhI)
• 15:10
Measurements of the spin observables in reaction $p\uparrow + p \rightarrow \Lambda\uparrow +X$, in the frame of the SPASCHARM program. 2h 50m
We propose to measure eight observables in the reaction $p\uparrow + p \rightarrow \Lambda\uparrow +X$, where polarized proton beam strikes the unpolarized proton target and produces polarized lambda hyperons. This observables include one spin independent parameter inclusive lambda production cross section Sigma, two single spin dependent parameters polarization Pn and analyzing power An and five two spin transfers parameters Dnn, R, R’, A and A’. All this parameters have never been measured experimentally. Sigma and polarization intensively measured in different experiment, analyzing power were measured at 18.5 GeV/c beam momentum and 200 GeV/c. The first attempt to measure 6 parameters were made by Swallow due to absence of longitudinal polarized beam only 6 parameters were measured. We have a goal to measure all 8 parameters using both transverse and longitudinal polarized beam. The construction of special beam channel is under development.
Speakers: Dr. Alexey Bogdanov (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)) , Ms. Marina Nurusheva (Borisovna)
• 15:10
Method of events selection in measurements of the reaction of stopped pion absorption 2h 50m
The method of selection of useful events in the stopped pion absorption reactions has been developed. The method is based on the use the system of monitor semiconductor detectors calibrated using registration of pion stops in the “living” target (a silicium detector). The monitor system energy threshold values are determined that allow to reach the maximum efficiency (~ 90%) of the selection of pion stops in the targets. The method was tested on the experimental data obtained on targets 6,7Li, 9Be, 10,11B, 12C, 28Si, 40Ca, 59Co, 93Nb, 114,117,120,124Sn, 169Tm, 181Ta, 209Bi. It is shown based on the analysis of the systematical errors that the absolute normalization precision of spectra with the method is 8%. This precision is significantly better than the results obtained with other methods.
Speaker: Mr. Roman Pritula (MEPhI)
• 15:10
Method of separation between light and heavy groups of primary CR nuclei by LDF of Cherenkov light in the range 300-3000 TeV 2h 50m
The well-known problem of chemical composition in the range before the knee in the cosmic-ray energy spectrum, 300-3000 TeV, has not yet been solved due to very small statistics collected from direct experiment. For most EAS experiments the region lower than 1000 TeV is below threshold. In the HiSCORE experiment the lateral distribution function (LDF) of Cherenkov light produced by EASs developing in the atmosphere from high energy primary particles (gamma rays, protons, nuclei) at energy more than 300 TeV can be measured in detail for millions of individual events. The shape of LDF is very sensitive to the depth of EAS maximum and as a result to the sort of primary particles. In this report, we developed a method and studied the possibility to separate heavy and light groups of nuclei using the 'knee-like' fitting functions of LDF. We revealed which parameters of fitting functions are the most sensitive to the sort of primary nuclei and showed that the additional fluctuations caused by the procedure of measurement (measurement fluctuation) should be known in detail. We carried out our investigation on CORSIKA- simulated data of LDF and compared it with the experimental data obtained in the HiSCORE array, estimated the measurement fluctuation and showed that at least two groups of particles P+He and CO-Fe can be separated.
Speaker: Mrs. abeer Elshoukrofy (shehata)
• 15:10
Multilayer Magnetics Screens for the PMT Protection 2h 50m
Measurement results of a magnetic field screening efficiency for various magnetics screens are presented. Studied magnetics screens are based on multilayer film deposited on aluminum housing for PMT. Obtained results are compared with efficiency of common magnetic screen materials.
Speaker: Prof. Valery Dmitrenko (NRNU MEPhI)
• 15:10
Nanotubes based neutron generator for calibration of neutrino and dark matter detectors 2h 50m
Small size neutron generators are promising tool for calibration of neutrino and dark matter detectors instead of the traditional neutron guns and isotope sources. We propose original construction of simple and compact neutron generator consists of carbon nanotubes (CNT) array with diameter 1 mm as ionizer together with deuterated target and vacuum-tight body filled with residual deuterium. Experimental results show the possibility to produce neutrons intensity in the range of 102-103 neutrons per second with the accelerating voltage of 10-40 kV and residual gas pressure of 1-5 mtorr. The multiwall CNT arrays with 1.5 $\mu$m diameter, 2 $\mu$m height and 3 µm distance, inscribed in a circle with a diameter of 1 mm, have been synthesized by plasma-enhanced chemical vapor deposition on the n-type high-conductive silicon substrate.
Speaker: Dr. Alexander Kubankin (Belgorod National Research University)
• 15:10
Natural infrared cutoff: new origin for the late time cosmic acceleration 2h 50m
Motivated by the ultraviolet deformation of the Hamiltonian systems in loop quantum cosmology, we investigate an infrared modification of the spatially flat FRW geometry. While the energy density and Hubble parameter get maximized in loop quantum cosmology, these quantities take the minimum values in our setup. Considering only a massless scalar field in matter dominated era in this setup naturally leads to a dynamical dark energy model and the dark component originates purely from infrared effects. The dynamical system analysis of the model also shows the viability of this model so that the universe starts from a matter dominated era, smoothly enters into a quintessence regime and then transits to a phantom era followed by a big rip singularity.
Speaker: Prof. Kourosh Nozari (University of Mazandaran)
• 15:10
Neutron halos in excited states of 12B 2h 50m
An experiment was done to search for states with a neutron halo in 12B. The measurements were carried out at the cyclotron of the University of Jyvaskyla (Finland) using Large Scattering Chamber (LSC). The idea of the work was to search for two states with the expected neutron halo, 1¯ and 2¯. Differential cross sections with excitation of 12B states, including abovementioned states, were observed. The preliminary calculations on halo radii by the method of asymptotic normalization coefficients for the 2¯ and 1¯ states gave following values: 5.9 fm and 7.7 fm, which is much larger than the radius of the valence neutron in the ground state. This confirms the presence of a neutron halo in these states, which are in a discrete spectrum. An unexpected result was obtained for the 3¯, 3.39 MeV state, which is in continium 19 keV above the decay threshold 12B → 11B + n, estimation for its halo radius is ~ 6.5 fm. This indicates that the halo is present in this state as well. Until now, the neutron halo in unbound states has been observed only for the members of the rotational bands.
Speaker: Mr. Andrey Danilov (NRC Kurchatov Institute)
• 15:10
Nonlinear electrodynamics, regular black holes and wormholes 2h 50m
A brief review of the existing regular models in general relativity coupled to nonlinear eelctrodynamics (NED). These include regular, purely magnetic black holes and soliton-like configurations with a regular center and dynamic wormholes with a magnetic source. It is shown that systems with an electric charge cannnot form such regular configurations.
Speaker: Prof. Kirill Bronnikov (VNIIMS)
• 15:10
Nucleon resonance structure from CLAS6 and CLAS12 experiments 2h 50m
The recent results on the photo- and electrocoulings extracted from the reaction of one-pion and two-pion photo- and electroproduction off proton in the resonsce region are presented. Photoproduction of two charged pions is of particular importance for evaluation of the photocouplings for the D(1620)1/2- , D(1700)3/2- , N(1720)3/2 + , and D(1905)5/2+ resonances, while the studied previously single-meson-baryon channels have limited sensitivity to these high-lying nucleon excited states.
Speaker: Mr. Valeriy Klimenko (MSU, Moscow, Russia)
• 15:10
Nucleosynthesis at magnetorotational instabilities in supernova explosion 2h 50m
Synthesis of chemical elements is investigated at conditions of magneto rotational instabilities in astrophysical plasma at supernova explosion. Respective strong magnetic fields are considered as noticeable pressure component for explosion mechanism. At such fields, magnetic modification of nuclear structure is shown to shift the nuclear magic numbers in the iron region towards smaller mass numbers approaching titanium. Consequently, maximum of nucleosynthesis products is modified with an enhancement of titanium yield. The results are corroborated with an excess of 44Ti revealed from the INTEGRAL mission data for yang supernova remnants at a field strength of teratesla. Such magnetic impact on nucleosynthesis in galactic chemical evolution is discussed.
Speaker: Ms. Ayazhan Zhomartova (MEPHI National Research Nuclear University)
• 15:10
On possible injection scheme for FCC-ee 2h 50m
Possible variant of the conventional injection scheme for 175 GeV/beam operation mode of FCC-ee collider is discussed. This operation mode is characterized by the largest horizontal emittance and the highest magnetic rigidity. The injection problem is complicated by the small dynamic aperture which is limited by the tight optics at the interaction points. The injection scheme proposed is aimed to solve the problem of the luminosity loss suppression.
Speaker: Dr. Helen Barminova (NRNU MEPhI)
• 15:10
Performance of the NA61/SHINE experiment at CERN SPS with Pb-ion beams 2h 50m
Performance of the NA61/SHINE experiment at CERN SPS for reconstruction of the Pb-Pb collisions with beam energies of 13, 30, and 150 AGeV during the SPS operation in 2016 will be presented. Effects of the trigger and event selection is studied for basic event variables such as multiplicity of particles reconstructed using two Vertex and two Main Time Projection Chambers (TPCs) of the NA61/SHINE experiment and forward energy measured with the Projectile Spectator Detector. Particle identification capabilities of the NA61/SHINE experiment are studied for charged hadrons based on their specific energy loss in the TPCs and for strange hyperons via their weak decay topology. These basic capabilities of the NA61/SHINE experiment are the key ingredients to study collective effects in charged and strange hadron production in Pb-Pb collisions at the SPS energies.
Speaker: Alexey Grobov (NRNU MEPhI)
• 15:10
Positive curvature from scalar field tunneling in the landscape 2h 50m
We present a model of vacuum tunneling through a classically forbidden region where a scalar field changes its value simultaneously over the entire volume of a (meta)stable ancestor vacuum with spherical curvature. The ancestor, analyzed by Graham et al. as the “simple harmonic universe,” consists of positive curvature, negative vacuum energy, and matter with positive sound speed squared and $-1 < p/\rho < -1/3$, and can be stable at the level of linearized perturbations. The tunneling leaves the geometry unchanged but rearranges the energetic contributions of the matter sources, leading to an inflating solution with residual positive curvature. We show that there exists a parametric regime where this solution is self-consistent and dominates the overall tunneling rate. We conclude that an experimental detection of positive curvature, while not necessarily likely, therefore does not rule out the possibility that our present observer patch originated from semiclassical vacuum tunneling in a string or field theoretic landscape.
Speaker: Prof. Bart Horn (Manhattan College)
• 15:10
Procedure for event characterization in Pb-Pb collisions at 40AGeV in the NA49 experiment at CERN SPS 2h 50m
The time evolution of the strongly interacting matter created in a heavy-ion collision depends on the initial geometry and the collision centrality. This makes important the experimental determination of the collision geometry. In this presentation a procedure for event classification and estimation of the geometrical parameters in inelastic Pb-Pb collisions at the beam energy of 40 AGeV recorded with the fixed target experiment NA49 at CERN SPS is discussed. In the NA49 experiment, event classes can be defined using measured multiplicity of particles in the Time Projection Chamber (TPC) or energy of spectators deposited in forward Veto or Ring calorimeters. Using the Monte-Carlo Glauber model, these event classes can be related to average values of the geometric quantities such as impact parameter or number of nucleon-nucleon collisions.The implementation of this procedure within a software framework of the future CBM experiment was adopted for event classification in the NA49 experiment. In the future, this procedure will be used for analysis of the new Pb-Pb data collected by the NA61/SHINE experiment and for comparison with the results previously obtained by STAR at RHIC and the NA49 at CERN SPS Collaborations.
Speaker: Elizaveta Zherebtsova (NRNU MEPhI)
• 15:10
Project of NNbar experiment at the WWR-M reactor 2h 50m
Supersource of ultracold neutrons on the basis of superfluid helium is under construction in PNPI NRC KI. It must provide UCN density 2-3 orders of magnitude higher than existing sources. For the new source we propose an experiment on search for neutron–antineutron oscillations based on the storage of ultracold neutrons in a material trap. The sensitivity of the experiment mostly depends on the trap size and the amount of UCN in it. The results of simulations of the designed experimental scheme show that the sensitivity can be increased by ~ 10–40 times compared to sensitivity of previous experiment depending on the model of neutron reflection from walls.
Speaker: Dr. Alexey Fomin (PNPI NRC KI)
• 15:10
QGP droplets formation using a quasi particle model 2h 50m
We study a quasiparticle model which deals with the formation of QGP droplets in the hadronic medium. The new results provide the significant contribution in the field of high energy heavy ion collisions.
Speaker: Dr. Yogesh Kumar (University of Delhi)
• 15:10
Quasi-elastic neutrino scattering off 12C: effects of the meson exchange currents and large nucleon axial mass 2h 50m
The quasi-elastic scattering of muon neutrino and electrons on a carbon target are analyzed using the relativistic distorted-wave impulse approximation (RDWIA). We also evaluate the contribution of the two-particle and two-hole meson exchange current (MEC) to electroweak response functions. The nuclear model dependence of the neutrino cross sections is studied within RDWIA+MEC approach and RDWIA model with large nucleon axial mass. It was shown that the results for the squared of momentum transfer distribution as well as for invariant mass of final hadronic system distribution obtained within these models are substantially different.
Speaker: Anatoli Butkevich (Institute for Nuclear Research Russian Academyof Sciences)
• 15:10
Radiative transitions and the mixing parameters of the D meson 2h 50m
Spectroscopic parameters of heavy-light flavoured D meson are obtained within the framework of phenomenological quark-antiquark potential (Coulomb plus linear confinement) model using the Gaussian wave function. We incorporated $\mathcal{O}(1/m)$ to the potential energy term and relativistic corrections to the kinetic energy term of the hamiltonian. We obtain the radiative (electric and magnetic) transitions and the mixing parameters of the $D_{q}^{0}-\bar{D}_{q}^{0}$ oscillation. The results are compared with various experimental measurement as well as other theoretical predictions.
Speakers: Dr. Ajaykumar rai (Sardar Vallbhbhai National Institute of Technology, Surat, Gujarat, India) , Mr. VIRENDRASINH KHER (THE MAHARAJA SAYAJIRAO UNIVERSITY OF BARODA)
• 15:10
Realistic simulation of BM@N GEM detectors: model implementation and testing 2h 50m
The Lorentz shift of electrons in a magnetic field is taken into account with simulating the response of a GEM detector for the BM@N experiment. Dependences of the determined coordinate x on the track angle, the values of the Lorentz shift of electrons and its dispersion for the gas mixtures ArC02 and ArC4H10 were obtained. The momentum resolution was obtained as a function of the momentum for the deuteron-carbon (dC) process, and the invariant mass of the Λ-hyperon was determined. The obtained results are close to those obtained in the experiment.
Speaker: Ms. Tatiana Mamontova (NRNU MEPhI)
• 15:10
RED-100 experiment : current status 2h 50m
The current status of the RED-100 experiment is presented. The detector is being prepared to study recently observed coherent elastic neutrino-nucleus scattering process using the nuclear reactor at Kalinin Nuclear Power Plant. All systems supporting operation of the RED-100 experimental setup are described. The experimental results (xenon purification; cryogenics, PMTs and HV system performance) of the last technical run are shown. Future plans for detector deployment are also presented.
Speaker: Alexander Khromov (NRNU MEPhI)
• 15:10
Regge Trajectories of triply heavy baryons 2h 50m
$\Omega_{ccc}$, $\Omega_{bbb}$, $\Omega_{ccb}$ and $\Omega_{bbc}$ baryons are considerable theoretical interest in a baryonic analogue of heavy quarkonium because of the color-singlet bound state of three heavy quark (c,b) combination inside ({\it free from light quarks}) \cite{olive}. Regge trajectories are concerned with the mass spectrum of the particles so that the present study exhibits the regge trajectories obtained from excited states of four experimentally unknown triply heavy $\Omega$ baryons. The trajectories are plotted in (n, $M^{2}$) and (J, $M^{2}$) planes which is helpful to determine the unknown quantum number and $J^P$ values. The calculations have computed in Hypercentral Constituent Quark Model with hyper coulomb plus linear potential \cite{EPJC}. Many author have also study the mass spectra by different approaches\cite{brown, PAD2014, vijande2015, kwei2}. However, LHCb experiment possibly detect $\Omega_{bbb}$, $\Omega_{bbc}$ and $\Omega_{bbc}^{*}$ baryons at appropriate integrated luminosity and collision energy \cite{lhcb}. \begin{thebibliography}{90} \bibitem{olive}{C. Patrignani et. al., Chin. Phys. C \textbf{40}, 100001 (2016)}. \bibitem{kwei2}K-W Wei, B. Chen and X-H Guo, Phys. Rev. D \textbf{92}, 076008 (2015). \bibitem{EPJC}Z. Shah, K. Thakkar and A. K. Rai, Eur. Phys. J. C {\bf76}, 530 (2016); Eur. Phys. J. C {\bf77}, 129 (2017);Chin. Phys. C \textbf{40}, 123102 (2016). \bibitem{brown}Z. S. Brown, W. Detmold, S. Meinel, and K. Orginos, Phys. Rev. D \textbf{90}, 094507 (2014) \bibitem{PAD2014} M. Padmanath, R. G. Edwards, N. Mathur, and M. Peardon, Phys. Rev. D \textbf{90}, 074504 (2014) \bibitem{vijande2015} J. Vijande, A. Valcarce and H. Garcilazo, Phys. Rev. D \textbf{91}, 054011 (2015). \bibitem{lhcb}S.-Z. Wu, Y.-W. Li and R. Rashidin, Phys. Rev. D {\bf 86}, 114504 (2012) \end{thebibliography}
Speakers: Dr. Ajaykumar Rai (SVNIT-SURAT, GUJARAT, INDIA) , Mrs. Zalak Shah (SVNIT-Surat, India)
• 15:10
Rescaling of quantized skyrmions; analytical treatment and numerical estimates 2h 50m
The role of rescaling (expansion or squeezing) of quantized skyrmions [1,2] is studied for the spectrum of baryons beginning with nucleon and $\Delta(1232)$, and with flavors strangeness, charm or beauty. The expansion of skyrmions due to the centrifugal forces has influence on the masses of baryons without flavor ($N$ and especially $\Delta$); this effect leads to correction of the well known results by Adkins, Nappi, Witten, and demands certain revision of the fit of the model, proposed in [3,4]. In the case of chiral symmetry \cite{anw} analytical treatment of the effect confirms results of numerical computations. The rescaling of skyrmions has small influence on the spectrum of strange baryons, it is more important for the case of charm, and crucial for baryons with beauty quantum number, where strong squeezing takes place [5]. Two competing tendencies are clearly observed: expansion of skyrmions when isospin (or spin) increases, and squeezing with increasing mass of the flavor. For the case of beauty baryon $\Lambda_b$ satisfactory agreement with data can be reached for the value $r_b= F_B/F_\pi \simeq 2.6$, for the case of $\Sigma_b$ there should be $r_b\sim 2$, so for the beauty flavor the method seems to be not quite satisfactory because of certain intrinsic discrepances. Some pentaquark states with hidden strangeness, charm or beauty are considered as well [5]. [1] T.H.R.~Skyrme. A nonlinear field theory. Proc.R.Soc. London, A260 (1961) 127; T.H.R.~Skyrme. A Unified Field Theory of Mesons and Baryons. Nucl.Phys. 31 (1962) 556 [2] E.~Witten. Global Aspects of Current Algebra. Nucl.Phys. B223 (1983) 422; Current Algebra, Baryons, and Quark Confinement. ibid B223 (1983) 433 [3] G.~Adkins, C.~Nappi, and E.~Witten. Static Properties of Nucleons in the Skyrme Model. Nucl.Phys. B228 (1983) 552 [4] G.~Adkins and C.~Nappi. The Skyrme Model with Pion Masses. Nucl.Phys. B233 (1984) 109 5. Vladimir B.~Kopeliovich and Irina K.~Potashnikova. Rescaling of quantized skyrmions: from nucleon to baryons with heavy flavor. e-Print: arXiv:1703.04373 [hep-th]
Speaker: Prof. Vladimir Kopeliovich (INR of RAS)
• 15:10
Scattering of kinks in a non-polynomial model 2h 50m
We study a model described by a single real scalar field in the two-dimensional spacetime. The model is specified by a potential which is non-polynomial and supports analytical kink-like solutions that are similar to the standard kinklike solutions that appear in the $\phi^4$ model when it develops spontaneous symmetry breaking. We investigate the kink-antikink scattering problem in the non-polynomial model numerically and highlight some specific features, which are not present in the standard case.
Speaker: Dr. Vakhid Gani (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Theory Department, National Research Center Kurchatov Institute, Institute for Theoretical and Experimental Physics, Russia)
• 15:10
Scintillation light detection with MAPD-3NK and MPPC-S12572-010P readout 2h 50m
We have investigated linearity and energy resolution of two different solid state photomultipliers (SiMPs) when reading out the LFS-8 scintillator. Fist SiMP (MAPD-3NK) from Zecotek Photonics consists of deeply burned cells and have an active area of 3.7x3.7 mm2. The second one (MPPC-S12572-010P) from Hamamatsu, however, has surface cell structure and an active area of 3x3 mm2. Both SiMPs have the same pixel density of 10000 mm-2. The size of the LFS-8 scintillator is 2x2x10mm3. Energy resolution and linearity of the SiMPs is studied in the energy range of 59.6-1275 keV. It is found that the MAPD-3NK and the MPPC-S12572-010P readout demonstrates a good linearity of signal detection as a function of the gamma ray energy in the studied energy range. The obtained results show a good energy resolution for the MAPD comparing to the MPPC. The measured gamma resolution at 662 keV is 13% and 20.5% for the LFS-8 scintillator coupled to the MAPD and the MPPC, respectively.
Speakers: Mr. Gadir Ahmadov (Joint Institute for Nuclear Reserach) , Mr. Ramil Akberov (Joint Institute for Nuclear Research)
• 15:10
Search for dark matter particle candidates production in association with a Z boson in pp collisions at center-of-mass energy of 13 TeV with the ATLAS detector 2h 50m
A search for dark matter particle candidates produced in association with a Z boson in proton-proton collisions at the total center-of-mass energy of 13 TeV is presented. The search uses 36.1 inverse femtobarn of data collected by the ATLAS experiment at the Large Hadron Collider in 2015 and 2016. Events with large missing transverse momentum and consistent with the decay of a Z boson into oppositely charged electron or muon pairs were selected in the analysis. Background estimates and corresponding systematic uncertainties are shown. Exclusion limits on the dark matter candidate and mediator masses are reported.
Speaker: Mr. Artem Basalaev (Petersburg Nuclear Physics Institute (PNPI))
• 15:10
Search for resonant absorption of solar axions by $^{83}Kr$ nuclei 2h 50m
Yu.M. Gavrilyuk$^1$, A.M. Gangapshev$^1$, A.V. Derbin$^2$, I.S. Drachnev$^2$, V.V. Kazalov$^1$, V.V.Kuzminov$^1$, V.N. Muratova$^2$, S.I. Panasenko$^1$, S.S. Ratkevich$^1$, D.A. Tekueva$^1$, E.V.Unzhakov$^2$, S.P. Yakimenko$^1$ $^1$Institute for Nuclear Research RAS, Moscow, Russia $^2$NRC "Kurchatov Institute" Petersburg Nuclear Physics Inst., Gatchina, Russia A search for solar axions using resonant absorption by $^{83}\rm{Kr}$ nuclei is continued with the krypton proportional counter at the Baksan Neutrino Observatory. The absorption should lead to the excitation of lower nuclear energy level of $^{83}\rm{Kr}$: $A + ^{83}\rm{Kr} \rightarrow ^{83}\rm{Kr}^*\rightarrow ^{83}\rm{Kr} + \gamma~ \rm{(8.41 keV)}$. The obtained model independent upper limit on the combination of isoscalar and isovector axion-nucleon couplings $|g_3-g_0|\leq 8.4\times 10^{-7}$ allows to set a new upper limit on the hadronic (KSVZ) axion mass of $m_{A}\leq 65$ eV ($95\%$ C.L.) with the generally accepted values $S$=0.5 and $z$=0.56. The resonant absorption of the Primakoff solar axions constrains on the axion–photon coupling and axion mass $|g_{A\gamma}\times m_A| \leq 6.3\times 10^{-17}$ that corresponds to the upper limit on KSVZ axion mass $m_{A}\leq 14.3$ eV. For solar axions produced by Compton and bremsstrahlung like processes the limit on axion-electron coupling and KSVZ axion mass are $|g_{Ae}\times m_A| \leq 1.8 \times 10^{-9}$~eV and $m_A \leq 98$ eV, correspondingly (all at 95$\%$ C.L.).
Speakers: Prof. Alexander Derbin (Petersburg Nuclear Physics Institute) , Mr. Evgeniy Unzhakov (Petersburg Nuclear Physics Institute)
• 15:10
Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in the ATLAS detector 2h 50m
The Standard Model Higgs boson produced in association with a top-quark pair(ttbar) can permit direct measurement of the top Yukawa coupling. This poster is focused on the Higgs->bb channel with ttbar decaying into one or two electrons or muons. The analysis used pp collision data at the center of mass energy of 13 TeV, collected with the LHC-ATLAS detector in 2015-2016. The search is already limited by systematic uncertainties mostly in background modeling. In order to improve the sensitivity of the analysis, events are categorized according to their jet multiplicities and b-tagging properties. We present the latest result from the ATLAS experiment with improved techniques to discriminate signal from background dominated by ttbar+jets production.
Speaker: Shunsuke Honda (University of Tsukuba)
• 15:10
Simulation of NICA-MPD inner tracking system 2h 50m
The heavy-ion collider NICA (Nuclotron-based Ion Collider fAcility) is being built in the Joint Institute for Nuclear Research (JINR) in Dubna on the base of which the experimental setup MPD (MultiPurpose Detector) will be constructed for studying nuclear matter at extreme values of density and temperature. The MPD inner tracking system is used to determine the decay vertices of the short-lived products formed in nucleus-nucleus collisions at high energies. Of particular interest is the study of strange and charmed particles, which can give undistorted information about the early stages of the evolution of the quark-gluon plasma. In this article we present the results of modeling the pointing resolution of different geometric configurations of the inner tracking system based on monolithic active pixel sensors. In addition, we demonstrate the results of Λ0 -reconstruction using selection criteria to suppress the high-level combinatorial background.
Speaker: Mr. Vladimir Chulikov (Saint Petersburg State University)
• 15:10
Sky-localization of the LIGO-Virgo events as a test of gravitational wave polarization state 2h 50m
Detection of the first gravitational wave events GW150914, GW151226 and LVT151012 by Advanced LIGO antennas has opened a new possibility for the study the fundamental physics of the gravitational interaction. Here we demonstrate that very general geometrical arguments allow us to distinguish between different polarization states predicted by scalar-tensor gravitation theories. Actual localization of the source of GW on the sky by means of measurements of the arrival time delays between different antennas together with relative amplitudes of the detected signals at each antenna of the net can be used for determining the polarization state of the wave independently on the nature of the GW source.
Speaker: Ms. Liudmila Fesik (PhD student)
• 15:10
Stable exponential cosmological solutions with zero variation of G in the Einstein–Gauss–Bonnet model with a Λ–term 2h 50m
A $D$-dimensional gravitational model with a Gauss-Bonnet term and the cosmological term $\Lambda$ is considered. By assuming diagonal cosmological metrics, we find, for certain fine-tuned $\Lambda$, a class of solutions with exponential time dependence of two scale factors, governed by two Hubble-like parameters $H >0$ and $h < 0$, corresponding to factor spaces of dimensions $m > 3$ and $l > 1$, respectively, with $(m,l) \neq (6,6), (7,4), (9,3)$ and $D = 1 + m + l$. Any of these solutions describes an exponential expansion of 3-dimensional subspace with Hubble parameter $H$ and zero variation of the effective gravitational constant $G$. We prove the stability of these solutions in a class of cosmological solutions with diagonal metrics. This result is generalized to the case of 3 factor spaces.
Speakers: Mr. Kubantai Ernazarov (RUDN) , Dr. Vladimir Ivashchuk (Center for Gravitation, VNIIMS)
• 15:10
Star motion around rotating black hole in the Galactic Center in real time 2h 50m
The Event Horizon Telescope'' team intend in the year 2020 to resolve the shadow of the supermassive black hole SgrA* in the Galactic Center. It would be the first attempt for direct identification of the enigmatic black hole. In other words, it would be the first experimental verification of the General Relativity in the strong field limit. There is a chance to find a star moving on the relativistic orbit close to this black hole. We present the animated numerical model of the gravitational lensing of a star (or any other lighting probe), moving around rotating Kerr black hole in the Galactic Center and viewed by the distant observer.
Speaker: Prof. Vyacheslav Dokuchaev (Institute for Nuclear Research of the Russian Academy of Sciences)
• 15:10
Status of the performance studies for strange hadron flow measurements in CBM at FAIR 2h 50m
Measurements of the directed and elliptic flow of strange and multi-strange hadrons are an important part of the physics program of the Compressed Baryonic Matter experiment (CBM) at the future accelerator complex FAIR in Darmstadt, Germany. It was shown recently by studies from RHIC BES program that $dv_{1}/dy \vert_{y=0}$ and the difference between $v_{2}$ of particles and antiparticles in the $\sqrt{s_{NN}}$ region of a few GeV are of great interest for understanding a pattern of the phase transition between quark-gluon and hadronic matter. Precision measurements of these observables in CBM experiment will be a significant step forward in exploration of the QCD phase diagram in the region of a $\sqrt{s_{NN}}$ = 2-5 GeV. We present recent results from the CBM performance studies for measurements of the directed ($v_{1}$) and elliptic ($v_{2}$) flow of strange hadrons, Λ and $K_{s}^{0}$. For performance studies we use CBMROOT environment for Monte-Carlo simulations and event reconstruction. Heavy-ion collisions at the FAIR beam energy of $E_{beam}$ = 10 GeV are simulated using the UrQMD event generator. Kalman Filter Particle Finder (KFParticleFinder) package for hyperon reconstruction via their weak decays, and the Projectile Spectator Detector for event plane determination. Effects due to non-uniformity of the CBM detector response in flow studies are investigated using the Qn-vector corrections framework originally developed for ALICE experiment at the LHC CERN.
Speaker: Dr. Dmitry Blau (NRC "Kurchatov Institute")
• 15:10
STRUCTURE OF 3-D DOT POTENTIAL 2h 50m
Models of 3-d dot potential - model with a derivative and integrated model are studied. Unlike usually used model with a derivative, the integrated model allows smooth transition of a condition of two centers in a condition of one center at reduction of distance between centers to zero. The model of pointed interactions adequately describes real nuclear interactions. The studied 3-dimensional potentials are characterized by "a local isotropy".
Speaker: Prof. Alexander Chikhachev (AlRussian Electrotechnical Institute)
• 15:10
Study of kinematic observables, sentitive to the Higgs boson production channel in $pp\rightarrow Hjj$ process 2h 50m

After the Higgs boson discovery at the LHC, a lot of additional measurements should be performed to make sure that the observed particle is the Standard Model Higgs boson. These measurements include cross sections measurements, couplings measurements, studies of the interaction vertex structures etc. One of the most perspective things to study is the kinematics of the production jets, associated with the Higgs boson. It is demonstrated, that the kinematic correlations of such jets can be used to distinguish different production channels of Higgs boson: gluon-gluon fusion (ggF) and vector boson fusion (VBF). Such separation is important due to the fact, that possible beyond Standard Model contributions in ggF and VBF channels lead to different physics effects, which should be taken into account separately in direct BSM searches.

Speaker: Mr. Nikita Belyaev (NRNY MEPhI)
• 15:10
Study of the influence of ADC sampling rate on the efficiency of neutron-gamma discrimination by the pulse shape 2h 50m
There is a number of applications where fast neutron detection in presence of gamma radiation is required: 1) control of neutron and gamma background in underground low-frequency experiments (neutrino and Dark matter detectors), 2) measurement of fast neutron yield from neutron generators, 3) control of spent nuclear fuel, 4) environmental monitoring. Such studies use scintillation detectors with organic crystals, plastic and liquid scintillators. The shape of the output pulses from such detectors depends on the particle type. In the present experiment, Pu-Be neutron source and two types of digitizers (CAEN DT5730 (500 MHz) and CAEN DT5743 (3.2 GHz)) were used. Both digitizers allow to store sequences of waveforms obtained from the detector. In the report, functional features of the CAEN DT5730 and CAEN DT5743 are described, and the experimental characteristics of their operation are compared. Experimental values of the efficiency of neutron/gamma signal separation using two ADCs with different sampling frequencies are presented.
Speaker: Mikhail Kirsanov (MEPhI)
• 15:10
Studying the structure of 9Be 2h 50m
Experimental data on inelastic $^{9}Be$+$\alpha$ scattering induced by 90 and 30 MeV α particles are analyzed. The question of the formation of a third rotational band based on the 2.78 MeV state is considered. The assumption is made about the occurrence of the 3.82 MeV state in the third rotational band.
Speaker: Mr. Viktar Starastsin (National Research Centre Kurchatov Institute)
• 15:10
SUSY searches in Vector Boson Topology review and mu+VBF trigger performance with 2017 data with the CMS experiment 2h 50m
We present a review of results in SUSY searches in VBF topology with 8 TeV data collected by the CMS experiment. A 13 TeV projection of this searches is presented with a report on the mu+VBF trigger performance using 2017 data collected.
Speaker: Dr. Jose Ruiz (Universidad de los Andes)
• 15:10
Tests of the Electromagnetic Calorimeter for HADES Experiment at GSI 2h 50m
Measurements of mass spectra of dilepton pairs in the HADES experiment in the energy domain of SIS18 and SIS100 (GSI, Germany) are very important to study the excitation function of the virtual photon radiation from dense nuclear matter. A large excess of the dilepton yield in the intermediate (0.14 < M < 0.6 GeV/c2) mass region points to a strong source generated from the high-density zone of HI collisions. A detail study of this phenomenon demands a precise knowledge of the hadronic cocktail, which is dominated by the $\eta$ Dalitz decay. Precise measurements of dielectron spectra given by $\pi$0 decay are also necessary for normalization. It is proposed to perform precise measurements of inclusive cross sections of $\pi$0 and $\eta$-meson production by electromagnetic calorimeter (ECAL) based on lead-glass Cherenkov detector modules. The ECAL will replace the currently existing the HADES Pre-Shower detector, located at forward angles (18 < $\theta$ < 45 grad). An additional advantage of ECAL would be the improvement of the electron/pion separation at larger momenta (p > 400 MeV/c) as compared to the present situation. The total area of the proposed HADES calorimeter amounts to about 8 m2 and covers polar angles between 12 and 45 grad. with almost full azimuthal coverage. It was shown in beam tests that the ECAL energy resolution is (5-6)% $\cdot$ E - 1/2. Detailed simulations show that this enables the $\eta$-meson reconstruction in the forthcoming experiment on Ag+Ag collisions at 1.65 A GeV and in future measurements on SIS100 with Ni+Ni collisions at energy range 2 - 8 A GeV. In this report, we briefly present the main details of the detector layout, construction of the lead-glass Cherenkov detector modules, the support structure and the electronic readout. The Stand for test measurements of ECAL detector modules on cosmic rays is described in detail and main results of cosmic test measurements are presented.
Speaker: Dr. Andrey reshetin (Institute for Nuclear Research, Russian Academy of Sciences, 117312 Moscow, Russia)
• 15:10
The calibration methods of hadron calorimeter modules with cosmic muons for the CBM experiment at FAIR 2h 50m
A modular hadron calorimeter, the Projectile Spectator Detector (PSD) at CBM is aimed to determine a collision centrality and to reconstruct the event plane orientation in collisions of heavy nuclei. PSD is a hadron lead/scintillator sandwich calorimeter with the sampling ratio providing the compensation condition. The calorimeter includes 44 individual modules. Each module consists of 60 lead/scintillator sandwiches with the 4 mm thickness of each scintillator plate and 16 mm lead plate. Each module has ten longitudinal sections and, respectively, ten compact photodetectors, the avalanche photodiodes MPPC with active area 3x 3 mm2. The modules after assembling were tested with the cosmic muons to evaluate the light yield of each longitudinal section. At first stage, the module was installed in the vertical position and the data were collected for a few hours. Clean peaks in amplitude spectra were observed in all 10 sections. At the second stage, the module was placed back into horizontal position and the data were collected in self-triggering mode. In the last case, the cosmic muons pass different lengths in the scintillator plates depending on the angular distribution of the muons. Therefore, no clear peaks were observed in the amplitude spectra. To select the muon tracks with the similar pass-lengths in the scintillator plates the track selection algorithms were used. In the simplest way, the events with the energy depositions in 3 neighbor sections were selected. These events correspond to the almost horisontal muon tracks crossing a few longitudinal sections in the module. The different algorithms of the energy calibration and the light yields of the calorimeter modules are discussed.
Speaker: Alexander Izvestnyy (Institute for Nuclear Research of the Russian Academy of Sciences)
• 15:10
The construction and parameters of Forward Hadron Calorimeter at MPD/NICA. 2h 50m
Forward hadron calorimeter (FHCAL) is intended for the measurements of the geometry of heavy ions collisions. The main purpose of the FHCAL is to provide an experimental measurement of a heavy-ion collision centrality and orientation of its reaction plane. FHCAL consists of two identical arms placed at the left/right sides from the beam collision point. This is a modular lead-scintillator compensating calorimeter designed to measure the transverse energy distribution of the projectile nuclei fragments (spectators) and forward going particles produced close to the beam rapidity. The FHCal has a large central beam hole. Therefore, in the peripheral collisions the most of heavy fragment escape into this beam hole. Nevertheless, the detection of the transverse energy distribution in inner and outer parts of the calorimeter allows the reconstruction of the collision centrality. The longitudinal segmentation of FHCal modules into 7 sections makes possible to identify the particle types (electrons, hadrons and muons) depending on the longitudinal profile of the energy losses in the modules. This identification ability is used for the quality check and the calibration of the FHCal modules with minimum ionizing particles. The construction of the FHCal modules, the methods of the energy calibration with cosmic muons and the parameters of the modules are discussed.
Speaker: Dr. Alexander Ivashkin (INR RAS)
• 15:10
THE GAMMA-RAY MOON SEEN BY THE FERMI LAT 2h 50m
When seen in gamma rays, the Moon appears brighter than the Sun. Gamma rays emitted by the Moon mostly originate from the decays of neutral pions produced by the interactions of cosmic rays with the lunar surface. Using the data collected by the Fermi LAT in its first seven years of operation, we measured the gamma-ray emission spectrum of the Moon in the energy range from 30 MeV up to a few GeV and we studied its time evolution, finding a correlation with the solar activity. We also developed a full Monte Carlo simulation based on the FLUKA code, which describes the production of gamma rays in the cosmic-ray interactions with the Moon. We used the simulation results to infer the cosmic-ray proton and helium spectra near the Earth from the lunar gamma-ray data.
Speaker: Dr. Francesco Loparco (Bari University and INFN)
• 15:10
The simplest imaginable solution to the cosmological constant problem 2h 50m
If quantum vacuum fluctuations are virtual gravitational dipoles, the gravitational charge density of the quantum vacuum is obviously equal to zero. While very counterintuitive this is the most elegant and the simplest solution to the cosmological constant problem. It is intriguing that in spite of the fact that the total gravitational charge of the quantum vacuum is zero, the gravitational effects of the quantum vacuum may exist because of the gravitational polarization of the quantum vacuum by the immersed Standard Model Matter (i.e. matter composed from quarks and leptons interacting through the exchange of gauge bosons). We present indications that the effects of such a bipolar quantum vacuum may be in agreement with observations.
Speaker: Dr. Dragan Hajdukovic (Institute of Physics, Astrophysics and Cosmology)
• 15:10
Topologically non-trivial configurations in the early Universe 2h 50m
We study formation and evolution of solitons within a model with two real scalar fields with the potential having a saddle point. The set of these configurations can be split into disjoint equivalence classes. We give a simple expression for the winding number of an arbitrary closed loop in the field space and discuss the evolution scenarios that change the winding number. These non-trivial field configurations lead to formation of the domain walls in the three-dimensional physical space. We also discuss possible observational consequences of the appearance these non-trivial field configurations.
Speaker: Dr. Alexander Kirillov (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Yaroslavl State P.G. Demidov University)
• 15:10
TOTAL REACTION CROSS SECTIONS MEASUREMENT 2h 50m
B. Erdemchimeg1,2, A. G. Artukh1, S. Davaa2, S. A. Klygin1, G. A. Kononenko1, G. Khuukhenkhuu2, S. M. Lukyanov1, T. I. Mikhailova1, Yu. M. Sereda1, Yu. E. Penionzhkevich1, A. N. Vorontzov1 1Joint Institute for Nuclear Research, JINR, Dubna, 141980, Russia, 2 Nuclear Research Center, National University of Mongolia, Ulaanbaatar, Mongolia e-mail: erdem@jinr.ru Preliminary results of measurements of the total reaction cross sections σR for weakly-bound 6,8He, 8,9Li, 7,9,12,14Be nuclei at energy range (25-45) A MeV 27Al and 208Pb targets are presented. The secondary beams of 6,8He, 8,9Li, 7,9,12,14Be were produced by bombardment of the 22Ne (40 A MeV) and 11B(33 A MeV) primary beam on Be (89 mg/cm2) target and separated by COMBAS fragment-separator. In dispersive focal plane a horizontal slit defined the momentum acceptance as 1% and a wedge degrader of 200 µm Al was installed. The Bρ of the second section of the fragment-separator was adjusted for measurements in energy range (25-45) A MeV. The secondary products were detected by a telescope consisting of two Si ΔE detectors 300 µm, 1000µm and E-detector, which consisted of nine CsI/Tl granules.
Speaker: Mrs. Erdemchimeg Batchuluun (JINR)
• 15:10
Usage of machine learning for the separation of electroweak and strong $Z\gamma$ production 2h 50m
Separation of electroweak from strong $Z\gamma$ production is a very challenging task due to identical final states of such processes. The only difference is the origin of two leading jets. Rectangular cuts on jet kinematical variables from ATLAS Run1 $Z\gamma$ analysis were improved using machine learning techniques. New selection variables were also tested. The reached expected significance of separation for ATLAS Run2 conditions and 36 $fb^{-1}$ amount of data is $6\sigma$.
Speakers: Mr. Alexander Petukhov (NRNU MEPhI) , Evgeny Soldatov (MEPhI)
• 15:10
Utilization of Passive Detector's Technologies for the "PHOENIX" Experiment on Board the International Space Station in 2014-2016 2h 50m
*The Russian long-term **'PHOENIX'** Space Experiment* started in November 2014 with the purpose of investigating the impact of space radiation on genetic properties and survival of biological samples exposed on-board the **International Space Station**. Such projects require detailed knowledge on the composition, fluxes and doses of various components of cosmic radiation. To solve this problem it is convenient to use passive detector's that have a number of advantages: they are cheap, compact, does not consume electric power, maintenance-free during exposure and allows to evaluate large number of physical quantities. In the first two-year phase of the on-going **Project** LET spectra, absorbed dose and dose equivalent rates are measured in the direct vicinity of the samples in three different modules of the *Russian segment* by applying sets of passive detector packages. The sets of space radiation detectors comprising of *Thermo-luminescent Dosimeters* made of LiF:Mg,Ti (MTS-6, MTS-7, DTG-4) materials and *Solid State Nuclear Track Detectors* made of PADC (polyallyl-diglycol-carbonate) are recovered in 4 consecutive sessions after **0.5**, **1**, **1.5** and **2** year exposure. The contribution of secondary neutrons and heavy nuclear fragments to the total space radiation doses is also assessed with the use of an extensive analysis. The space radiation data acquired in the experiment allowed observing the dose variations on the decline of the 24th Solar Cycle. Averaged measurements from the first session (Nov 2014 - Jun 2015) resulted in more than **2.5** times higher total dose rate in the *Pirs* docking module than in the *Service* module. This difference might be explained by the much weaker shielding of the *Pirs* module, thus the greater contribution of high-LET components to the dose rate and the easier penetration of low-LET particles. This report presents detailed analysis of space radiation data obtained with passive detectors during the 1st Phase of the **Project** in 2014-2016 by Russian and Hungarian research groups.
Speaker: Mr. Konstantin INOZEMTSEV (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
• 15:10
What drives the kinematic evolution of galaxies? 2h 50m
One important result from recent large integral field spectrograph (IFS) surveys is that the intrinsic velocity dispersion of galaxies increases with redshift. Massive, rotation-dominated discs are already in place at z~2, but they are dynamically hotter than spiral galaxies in the local Universe. Although several plausible mechanisms for this elevated velocity dispersion (e.g. star formation feedback, elevated gas supply, or more frequent galaxy interactions) have been proposed, the fundamental driver of the velocity dispersion enhancement at high redshift remains unclear. We investigate the origin of this kinematic evolution using a suite of cosmological simulations from the FIRE (Feedback In Realistic Environments) project. These simulations reproduce the observed trends between intrinsic velocity dispersion , SFR, and z, but the intrinsic velocity dispersion traced by the star-forming gas in the simulated galaxies is systematically lower than the observed values. In both the observed and simulated galaxies, the velocity dispersion is positively correlated with SFR. The velocity dispersion increases with redshift out to z~1 and then flattens beyond that. In the FIRE simulations, the velocity dispersion can vary significantly on timescales of less than 100 Myr. These variations closely mirror the time evolution of the SFR and gas inflow rate. By cross-correlating pairs of velocity dispersion, gas inflow rate, and SFR, we show that the increased gas inflow leads to subsequent enhanced star formation, and enhancements in the velocity dispersion tend to temporally coincide with increases in gas inflow rate and SFR.
Speaker: Prof. Chao-Ling Hung (Manhattan College)
• Tuesday, 3 October
• 08:00 10:00
Gravitation and Cosmology - 1 Moskvorechye-2 hall

### Moskvorechye-2 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Alexander Zakharov (leading researcher)
• 08:00
Wormholes with fluid sources. A no-go theorem and new examples 15m
For static, spherically symmetric space-times in general relativity (GR), a no-go theorem is proved: it excludes the existence of wormholes with flat and/or AdS asymptotic regions on both sides of the throat if the source matter is isotropic, i.e., the radial and tangential pressures coincide. Under a simple assumption on the behavior of the spherical radius $r(x)$, we obtain a number of examples of wormholes with isotropic matter and one or both de Sitter asymptotic regions, allowed by the no-go theorem. We also obtain twice asymptotically flat wormholes with anisotropic matter, both symmetric and asymmetric with respect to the throat, under the assumption that the scalar curvature is zero. Such solutions may be on equal grounds interpreted as those of GR with a traceless stress-energy tensor and as vacuum solutions in a brane world. As a by-product, we obtain twice asymptotically flat regular black hole solutions with up to four Killing horizons.
Speaker: Prof. Kirill Bronnikov (VNIIMS)
• 08:15
On the theory of spherically symmetric shells in Conformal Gravity 15m
The spherically symmetric thin shells are the nearest generalizations of the point-like particles. Moreover, they serve as the simple source of the gravitational fields both in General Relativity and much more complex quadratic gravity theories. We are interested in the special and physically umportant case when all the quadratic in curvature tensor (in Riemann tensor) and its constructions (Ricci tensor and scalar curvature) terms are present in the form of the square of Weyl tensor. By definiton, the energy-momentum tensor of the thin shell is proportional to Dirac's delta-function. We constructed the theory of the spherically symmetric thin shells for three types of gravitational theories with the shell. 1) Pure conformal (Weyl) gravity. The gravitational part of the total Lagrangian is just the square of the Weyl tensor. 2) Weyl + Einstein gravity. 3) Weyl + Einstein-dilaton gravity with the possibility of particle creation. The results are compared with these in General Relativity (Israel equations). We considered in details the shells immersed in the vacuum. Some peculiar properties of such shells are found. In particuliar, for the traceless (= massless) shell it is shown that their dynamics can not be derived from the matching conditions and, thus, is completely arbitrary. In the case 3) the possible physical interpretation of the (mathematicaly allowed) double layer is briefly discussed.
Speaker: Prof. Victor Berezin (Institute for Nuclear Research of the Russian Academy of Sciences)
• 08:30
Quantum-corrected ultraextremal horizons 15m
The distinguished role of extremal horizons is beyond any doubts. It is sufficient to mention briefly such issues as black hole entropy, the scenarios of evaporation including the nature of remnants, etc. Meanwhile, although such object appear naturally on the pure classical level (the famous examples is the Reissner-Nordstrom black hole with the mass equal to charge), the question of their existence becomes non-trivial in the semiclassical case, when backreaction of quantum fields (whatever weak it be) is taken into account. This is due to the fact that the quantum-corrected metric contains some combinations of the stress-energy tensor having the meaning of the energy measured by a free-falling observer that potentially may diverge near the extremal horizon. However, numerical calculations showed that such divergencies do not occur for massless fields in the Reissner-Nordstrom background [1]. Analytical studies for massive quantized fields [2] gave the same result. Then they have been extended to so called ultraextremal horizons [3] when the metric coefficient $-g_{tt} \sim (r_{+}-r)^{3}$ near the horizon (here $r$ is the Schwarzschild-like coordinate, $r=r_{+}$ corresponds to the horizon). Such horizons are encountered, for example, in the Reissner-Nordstrom-de Sitter solution, when the cosmological constant $\Lambda >0$ [4]. In doing so, it turns out that the horizon is of cosmological nature, so $r$ approach $r_{+}$ from $r < r_{+}$. The results for ultraextremal horizons are obtained in [3] for massive fields only. We examine backreaction of the quantized scalar field with an arbitrary mass and curvature coupling on ultraextremal horizons. We examine the behavior of the stress-energy tensor of the quantized field near $r_{+}$ and show that, under influence of the quantum backreaction, the horizon of such a kind moves to a new position near which the metric does not change its asymptotics, so the ultraextremal black holes and cosmological spacetimes do exist as self-consistent solutions of the semiclassical field equations. In the limit of the large mass our results agree with previous ones known in literature. [1] P.R. Anderson, W.A. Hiscock, and D.J. Loranz, *Phys. Rev. Lett.* **74**, 4365 (1995). [2] J. Matyjasek, O. Zaslavskii, *Phys. Rev. D* **64**, 104018 (2001). [3] J. Matyjasek, O. Zaslavskii, *Phys. Rev. D* **71**, 087501 (2005). [4] L.J. Romans, *Nucl. Phys.* **B383**, 395 (1992).
Speaker: Dr. Arkadiy Popov (Institute of Mathematics and Mechanics, Kazan Federal University)
• 08:45
Topological geons with self-gravitating phantom scalar field 15m
A topological geon is the quotient manifold $M/Z_{2}$ where $M$ is a static spherically symmetric wormhole having the reflectional symmetry with respect to its throat. We classify the space of such asymptotically flat solutions of the Einstein-Klein-Gordon equations according to the form of the time-time metric function by using the quadrature formulas of the so-called inverse problem for self-gravitating spherically symmetric scalar fields. In particular, at the first (asymptotical) level of the classification, the Ellis solution separates all geon spacetimes into two classes. We also study possible observable effects associated with geodesic motion near various topological geons.
Speakers: Mr. Ivan Potashov (Tver State University) , Dr. Julia Tchemarina (Tver State University)
• 09:00
On generalized Melvin's solution corresponding to the Lie algebra $E_6$ 15m
A multidimensional generalization of Melvin's solution (originally describing the gravitational field of a magnetic flux tube in four dimensions) is considered. Being defined in $D$-dimensional spacetime, the generalized solution is also related to an arbitrary simple Lie algebra $\cal G$ corresponding to some hidden symmetries of the master equations of the model. The gravitational model contains $n$ 2-forms and $l \geq n$ scalar fields, where $n$ is the rank of $\cal G$. The solution is governed by a set of $n$ functions $H_s(z)$ obeying $n$ ordinary differential equations with certain boundary conditions imposed. It was conjectured earlier that these functions should be polynomials (the so-called fluxbrane polynomials). The polynomials $H_s(z)$, $s = 1,\dots,6$, for the Lie algebra $E_6$ are obtained and a corresponding solution for $l = n = 6$ is presented. The polynomials depend on integration constants $Q_s$. They obey symmetry and duality identities. The latter ones are used in deriving asymptotic relations for solutions at large distances. The power-law asymptotic relations for $E_6$-polynomials at large $z$ are governed by integer-valued matrix $\nu = A^{-1} (I + P)$, where $A^{-1}$ is the inverse Cartan matrix, $I$ is the identity matrix and $P$ is permutation matrix, corresponding to a generator of the $Z_2$-group of symmetry of the Dynkin diagram. The 2-form fluxes $\Phi^s$ are calculated.
Speaker: Dr. Sergei Bolokhov (Peoples' Friendship University of Russia)
• 09:15
The use of non-standard clock synchronization according to Hans Reichenbach in the integral covariant formulation of the conservation laws 15m
In 1930, Reichenbach established the possibility of generalization of Einstein's definition of synchronizing spatially separated a couple of hours, introducing Reichenbach parameter that varies from zero to one, which defines one-way speed of light. A fundamental constant is the average speed of light back and forth. The independence of this observed value of the choice of inertial reference systems supported by the Michelson-Morley experiment.Then John A Winnie in 1970, formulated a generalization of the special theory of relativity to the case of generalized synchronization Reichenbach. Currently, there is discussion about the consistency with the physical experiments of Reichenbach's thesis of the conventionality of simultaneity spatially separated clocks. Without entering into this discussion about the physical reality according to Reichenbach's thesis in this paper, we propose the possibility of using non-standard synchronization in the relativistic -invariant integral formulation of the laws of conservation of charge, the energy - momentum, and other conserved quantities. For two inertial reference systems, the relativity of simultaneity phonological paradigmatic events.Richard Feynman in his Nobel lecture gave an example of the departure of electron-positron pair from the two ends of the rod of finite length. On the basis of the fact of the relativity of simultaneity of these two events, he concluded that the local law of conservation of electric charge for non-point objects. At first, for example, in a textbook of Theoretical Physics Landau-Lifshitz theory of special relativity is formulated in four-dimensional space-time of Minkowski. The equations of the dynamics of the material point is a relativistic generalization of Newton's laws contain as a time parameter interval proportional to the proper time of the moving material point, which does not depend on clock synchronization. By synchronizing the clocks do not depend on the energy, momentum, and other conserved quantities. Consider the insular system of mutually motionless particles. The law of conservation of charge for this system in differential form is expressed as the vanishing of the divergence of a four-vector volumetric current density. To calculate the integral formulation of the integral over the four-volume tube world lines of particles insular system, forming a four-cylinder. This cylinder ends of two perpendicular to the world lines of the surfaces of simultaneous events belonging to the two points in time of the observer in his own frame of reference insular system. The lateral surface of the cylinder tends to spatial infinity, where the charges are zero. In the four-dimensional Gauss theorem the volume integral is converted to the integral over a closed surface, decaying on the lateral surface and two bases. The result is an equality of two integrals over the three-dimensional hypersurfaces for different points in time. This means consistency, i.e the conservation of the total charge insular system. All the above corresponds to the integrated treatment of conservation laws in the course of Landau-Lifshitz. If we move to the laboratory reference system relative to which the insular system is moving inertially, then the hypersurface of simultaneity used in the insular system, cease to be orthogonal to the temporal axis of the laboratory system. Because of the relativity of simultaneity there is an unequal one second parameter Reichenbach, the speed of light is a fundamental constant is only an average. The hypersurfaces of simultaneity in the four-dimensional Minkowski space are invariant geometric objects. In the area of the relativity of simultaneity, you can choose any hypersurface, while the numerical values of the integrals of the remaining quantities do not depend on the choice of hypersurfaces of simultaneity. Thus, if you declare a custom setting for the Reichenbach physically invalid, it returns solemnly to ensure the covariant integral formulation of the conservation laws of physical quantities.
Speaker: Prof. Valery Stepanov (Russian Federation)
• 09:30
Black-holes-hedgehogs in the false vacuum and a new physics beyond the Standard Model 15m
In the present talk, we consider the existence of the two degenerate universal vacua: a) the first Electroweak vacuum at $v=246$ GeV - "true vacuum", and b) the second Planck scale "false vacuum" at $v_2\sim 10^{18}$ GeV. In these vacua, we investigated the different topological defects. The main aim of this paper is an investigation of the hedgehog's configurations as defects of the false vacuum. In the framework of the $f(R)$ gravity, suggested by authors in their Gravi-Weak Unification model, we obtained a black hole solution, which corresponds to a "hedgehog" - global monopole, "swallowed" by a black-hole with mass $\sim 10^{19}$ GeV. These black-holes form a lattice-like structure of the vacuum at the Planck scale. Considering the results of the hedgehog lattice theory in the framework of the SU(2) Yang-Mills gauge-invariant theory with hedgehogs in the Wilson loops, we have used the critical value of temperature for the hedgehog's confinement phase. This result gave us the possibility to conclude that there exist triplet Higgs fields which can contribute to the SM at the energy scale $\simeq 10^4\sim 10^5$ GeV. Showing a new physics at the scale $10\sim 100$ TeV, these triplet Higgs particles can provide the stability of the EW-vacuum of the SM.
Speaker: Dr. Chitta Ranjan Das (BLTP, JINR, Dubna, Russia)
• 09:45
SCATTERING AND ORBITING IN Black Hole Spacetime 15m
**We investigate the transmission and reflection coefficient and absorption and scattering cross section of spin 0,1,2 particles which are massless from black holes. Here orbiting scattering can be characterized of massless particles from Reissner-Nordstrom black hole at a critical angular momentum. We examine the effects upon reflection,transmission,scattering and absorption cross section due to the black hole charge.**
Speaker: Dr. M. Ayub Faridi (University of the Punjab)
• 08:00 10:00
Heavy Ion Physics - 1 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Dr. Victor Riabov (PNPI, MEPHI)
• 08:00
Overview of the Compressed Baryonic Matter experiment at FAIR 20m
Ilya Selyuzhenkov for the CBM Collaboration In this talk an overview of the heavy-ion program and the status of the Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR), which is being under construction in Germany, will be given.
Speaker: Ilya Selyuzhenkov (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
• 08:20
Recent Flow results from RHIC 20m
Speaker: Dr. Arkadiy Taranenko (MEPhI)
• 08:40
CBM performance for anisotropic flow measurements 20m
Compressed Baryonic Matter experiment (CBM) at FAIR has a potential of discoveries in the area of QCD phase diagram with high net baryon densities and moderate temperatures. Anisotropic transverse flow is one of the key observables to study the properties of matter created in a heavy-ion collisions. CBM performance for anisotropic flow measurements is studied with Monte-Carlo simulations of gold ions at SIS-100 energies using heavy-ion event generators. Different combinations of the CBM detector subsystems are used to investigate the possible systematic biases in flow measurement and to study effects of detector azimuthal non-uniformity. Resulting performance of the CBM for flow measurements is demonstrated for directed flow of identified charged hadrons as a function of rapidity and transverse momentum in different centrality classes.
Speaker: Mr. Viktor Klochkov (GSI Helmholtzzentrum für Schwerionenforschung)
• 09:00
Search for collective phenomena in high multiplicity events at Nuclotron and U-70 20m
More than ten-year experimental search for high multiplicity phenomena is carried out at Laboratory of high-energy physics (JINR). We present main results, which have been received at U-70 accelerator (IHEP, Protvino) in proton collisions and at Nuclotron (JINR, Dubna) in nuclear interactions. For pp interactions, the topological cross sections have been gone three orders down and achieved of KNO-scaling variable (n/\overline n) 4.5 for the total acceptance. Probably, the tail of high multiplicity distribution is stipulated of gluon splitting. In region of high multiplicity, the formation of pions is predominant. Some collective phenomena is predicted in this region. Using charged multiplicity data, we could restore total (sum of charged and neutral particles) multiplicity and realized unique research of fluctuations of the neutral particle number at given total multiplicity. Revealed growth of a scaled variance may indicate the pion (Bose-Einstein) condensate formation. The excess of soft photon yield at interactions of Nuclotron's beams (d, Li and C) with a carbon target has been confirmed. This can be connected with a pion condensate formation. At present, we prepare our two-shoulder electromagnetic calorimeter to carry out experimental studies at BM@N setup and take part into new experiments on heavy ion collisions at Nuclotron.
Speaker: Dr. Elena Kokoulina (JINR)
• 09:20
Forward-backward correlations between event-by-event average transverse momenta in Pb-Pb collisions with ALICE 20m
Forward-backward (FB) correlations are considered to be a powerful tool for the exploration of the early dynamics of hadronic interactions. The FB correlation functions can be constructed from different observables calculated event-by-event in two separated pseudorapidity regions. We report a measurement of the event-by-event average transverse momentum correlation for charged particles in two separated pseudorapidity regions in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ and 5.02 TeV recorded with ALICE at the LHC. The event-by-event average transverse momenta correlations are robust against volume fluctuations and thus the centrality determination methods, which provides higher sensitivity to the properties of the initial state and evolution of the medium created in AA collisions. The strength of the FB correlation is calculated for different centralities of the Pb-Pb collisions. Results are compared to Monte Carlo event generators, such as HIJING and AMPT.
Speaker: Igor Altsybeev (St.Petersburg State University)
• 09:40
Latest results from the NA61/SHINE experiment 20m
The NA61/SHINE experiment at the CERN Super Proton Synchrotron is pursuing a rich programme on strong interactions, which covers the study of the onset of deconfinement and aims to discover the critical point of strongly interacting matter by performing an energy and system-size scan at the full CERN SPS beam momentum range. So far the scans of p+p, p+Pb, Be+Be, and Ar+Sc have been completed, Xe+La collisions will be registered this year, and samples of Pb+Pb data at three energies have been already taken. Results from the different reactions are now emerging, in particular the energy dependencies of hadron spectra and yields as well as fluctuations. Status and preliminary results from this effort will be presented, as well as an outlook for future extensions of the strong interaction programme.
Speaker: Dag Toppe Larsen (Uniwersytet Jagielloński)
• 08:00 10:00
High Energy Physics - 1 Moskvorechye-1 hall

### Moskvorechye-1 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Evgeny Soldatov (MEPhI)
• 08:00
Proton structure in the LHC era: impact of the CMS measurements 20m
Precision of the proton structure description, being a fundamental topic of high-energy physics, remains the source of a large uncertainties in theory predictions for the cross sections at hadron colliders. On the other hand, with increasing precision in the LHC measurements of cross sections of production of jets, electroweak bosons and top-quark pairs, it becomes possible to constraint the description of the proton structure in yet unexplored kinematics. Presented is the impact of the CMS data collected in Run I and Run II on the understanding of the proton structure, expressed via parton distribution functions, and on the precision of the strong coupling constant and quark masses.
Speaker: Dr. Katerina Lipka (DESY)
• 08:20
Nuclear parton distribution functions (nPDFs) and their uncertainties in the LHC Era 15m
We have performed a next-to-next-to-leading order (NNLO) QCD analysis of nuclear parton distribution functions (nPDFs) [**Phys. Rev. D 93 (2016) 014026, arXiv:1601.00939 [hep-ph]**] using all available neutral current charged-lepton ($\ell ^\pm$ + nucleus) deeply inelastic scattering (DIS) data and Drell-Yan (DY) cross-section ratios $\sigma_{DY}^{A}/\sigma_{\rm DY}^{A^\prime}$ for several nuclear targets. We have studied in detail the parametrizations and the atomic mass (A) dependence of the nuclear PDFs at this order. Our nuclear PDFs (KA15) provides a complete set of nuclear PDFs, $f_i^{(A, Z)}(x, Q^2)$, with a full functional dependence on $x$, A, Q$^2$. The uncertainties of the obtained nuclear modification factors for each parton flavour are estimated using the well-known Hessian method. The nuclear charm quark distributions are also added into the analysis. We compare the parametrization results with the available data and the results of other nuclear PDFs groups. We have found that our nuclear PDFs to be in reasonably good agreement with them. The estimates of errors provided by our global analysis (KA15) are rather smaller than those of other groups. In this talk, we will briefly review the recent LHC heavy-ion collisions data including the first experimental data from the LHC proton+lead and lead+lead run which can be used in the global fits of nuclear PDFs. We highlight different aspects of the high luminosity Pb--Pb and p--Pb data which have been recorded by the CMS Collaboration. The first experimental results published by the ALICE and CMS collaborations for the proton-lead (p--Pb) collisions at a nucleon--nucleon center--of--mass energy of $\sqrt{s_{\rm NN}}$ = 5.02 TeV and the data recorded by CMS in Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV will be summarized in details.
Speaker: Dr. Hamzeh Khanpour (University of Science and Technology of Mazandaran, Behshahr, IRAN)
• 08:35
Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at the SPS energies 15m
A search for the critical behavior of strongly interacting matter was done by studying the event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic pp collisions at 20, 31, 40, 80 and 158 GeV/c beam momentum at the NA61/SHINE experiment. Results for energy dependence of the scaled variance of the multiplicity distribution and for two families of strongly intensive measures of multiplicity and transverse momentum fluctuations $\Delta[P_{T},N]$ and $\Sigma[P_{T},N]$ are presented. These variables were studied in different pseudorapidity intervals, which correspond to changing the baryon chemical potential and the value of temperature at the freeze-out stage. The strongly intensive measures $\Delta[N_{F},N_{B}]$ and $\Sigma[N_{F},N_{B}]$ were also used in the analysis of short- and long-range multiplicity correlations. Results on multiplicity and transverse momentum fluctuations significantly depend on charges of selected hadrons and width and/or location of pseudorapidity intervals. Monte Carlo event generator EPOS does not describe the data for the $\Delta[P_{T},N]$ measure. Forward-backward fluctuations also reveal discrepancy between the EPOS and the experimental results.
Speaker: Ms. Daria Prokhorova (Saint Petersburg State University)
• 08:50
Search for K+ to pi+ nu nu at NA62 15m
K->pinunu is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio of the K+->pi+nunu decay with 10% precision. NA62 took data in 2015-2017; the analysis of a partial data set allows to reach the Standard Model sensitivity. The status of the experiments will be reviewed, and prospects will be presented.
Speaker: Ms. Silvia Martellotti (INFN Laboratori Nazionali di Frascati)
• 09:05
Study of radiative Ke3gamma decay 15m
Results of study of the K+ -> pi0 e+ nu gamma decay at OKA setup are presented. The branching ratio and T-odd asymmetry are measured on large statistics.
Speaker: Dr. Alexander Polyarush (INR)
• 09:20
Recent results from the NA48 experiment at CERN 15m
The NA48/2 experiment presents a final result of the charged kaon semileptonic decays form factors measurement based on 4.28 million K±e3 and 2.91 million K±μ3 selected decays collected in 2004. The result is competetive with other measurements in K±μ3 mode and has a smallest uncertainty for K±e3, that leads to the most precise combined K±l3 result and allows to reduce the form factor uncertainty of |VUS|. The NA48/2 experiment at CERN collected a very large sample of charged kaon decays into multiple final states. From this data sample we have reconstructed about 1500 events of the very rare decay K+- —>mu+- nu e+ e- over almost negligible background in the region with m(e+e-) above 140 MeV, which is of great interest in Chiral Perturbation Theory. We present the m_ee spectrum and a model-independent measurement of the decay rate for this region.
Speaker: Mr. Sergey Shkarovskiy (JINR, Dubna)
• 09:35
New neutron lifetime measurements with the big gravitational trap and review of neutron lifetime data 20m
Mean neutron lifetime is one of the most important physical constants which serves for determining parameters of weak interaction and predictions of primordial nucleosynthesis theory. There is still unsolved problem of 3.9 standard deviation discrepancy of measurements with beam method and storage method. In our experiment the measurements of neutron lifetime are carried out using method of storing neutrons in material trap with gravity barrier on top. Covering of the trap walls is made of hydrogenless fluorine-containing polymer fombling-grease UT-18. Covering stability to multiple cooling to 80 K and heating to 300 K was tested. The result of the measurements is τ_n=881.5±0.7_stat±0.6_syst s which is in agreement with conventional value 880.2±1.0 s presented in Particle Data Group. In conclusion the analysis of available data on measurements of neutron lifetime will be presented.
Speaker: Prof. Anatolii Serebrov (PNPI NRC KI)
• 10:00 10:30
Coffee-break 30m
• 10:30 12:30
Plenary - 3 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Sergey Rubin (MEPhI)
• 10:30
Results of the space mission RadioAstron 30m
The RadioAstron Space VLBI mission utilizes the 10-m radio telescope on board the dedicated Spektr-R spacecraft to observe cosmic radio sources with an unprecedented angular resolution at 92, 18, 6 and 1.3 cm. The longest baseline of the space-ground interferometer is about 350 000 km. It successfully operates since 2011 together with up to 40 largest ground radio telescopes. Formal resolution as high as 8 and 11 microarcsec has been achieved for mega-masers and quasars observed at 22 GHz, respectively. Successful results have been obtained in all areas of its science program including active galactic nuclei, pulsars and scattering, galactic and extragalactic masers. In particular, the survey of active galactic nuclei has found that cores of quasars are at least one order of magnitude brighter than what was known previously. This has critical physical implications for physics of jet emission in active galaxies. A new scattering effect was discovered from observations of both pulsars and quasars. It allows scientists to estimate parameters of scattering screens as well as provides a new window of opportunity to reconstruct true images of background sources distorted by scattering. We will review the current status of the RadioAstron Space very long baseline interferometer and its main science results.
Speaker: Dr. Yuri Kovalev (Lebedev Physical Institute)
• 11:00
Problems of modern cosmology 30m
Speaker: Prof. Alexander Dolgov (Novosibirsk State University and ITEP)
• 11:30
Gravitational waves 30m
Speaker: Prof. Konstantin Postnov (Sternberg Astronomical Institute)
• 12:00
Development of JINR accelerators for relativistic nuclear physics and heavy ion physics 30m
• 12:30 13:30
Lunch 1h
• 13:30 15:15
Plenary - 4 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Peter Senger (GSI)
• 13:30
A review of the theoretical heavy ions physics 30m
• 14:00
Recent results from the ALICE experiment at the LHC 30m
The main goal of the ALICE experiment is the characterization of the Quark-Gluon Plasma (QGP), the strongly interacting state of matter created in heavy-ion collisions at the LHC. Thanks to its excellent particle identification capabilities down to low transverse momentum, a comprehensive variety of QGP-related signals has been studied providing insights about QCD interaction at extreme energy density. The results range from global observables (charged particle distributions, collective flow, multi-particle correlations,...) to identified particle spectra at intermediate momenta, where hydrodynamic and recombination models are tested, and to hard probes (jets, heavy quarks and quarkonia). In this presentation, I will review the main ALICE results, with an emphasis on recent achievements, including observations of intriguing similarities among small (pp, p-Pb) and large (Pb-Pb) systems that suggest the presence of collective phenomena in pp and p-Pb collisions. Selected results from pp, p-Pb and Pb-Pb collisions at different centre of mass energies will be presented.
Speaker: Dr. Pietro Antonioli (INFN Bologna)
• 14:30
Recent results from RHIC beam energy scan 30m
Speaker: Prof. Olga Evdokimov (University of Illinois at Chicago)
• 15:00
Direct immersion cooled IMMERS High Performance Computing clusters building experience 15m
• 15:15 15:45
Coffee-break 30m
• 15:45 18:15
Gravitation and Cosmology - 2 Moskvorechye-1 hall

### Moskvorechye-1 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Sergey Rubin (MEPhI)
• 15:45
The black hole at the Galactic Center: observations and models 15m
Now there are two basic observational techniques to investigate a gravitational potential at the Galactic Center, namely, a) monitoring the orbits of bright stars near the Galactic Center to reconstruct a gravitational potential; b) measuring a size and a shape of shadows around black hole giving an alternative possibility to evaluate black hole parameters in mm-band with VLBI-technique. At the moment one can use a small relativistic correction approach for stellar orbit analysis (however, in the future the approximation will not be not precise enough due to enormous progress of observational facilities) while now for smallest structure analysis in VLBI observations one really needs a strong gravitational field approximation. We discuss results of observations, their conventional interpretations, tensions between observations and models and possible hints for a new physics from the observational data and tensions between observations and interpretations. We discuss an opportunity to use a Schwarzschild metric for data interpretation or we have to use more exotic models such as Reissner -- Nordstrom or Schwarzschild -- de-Sitter metrics for better fits. From an analysis of S2 star trajectory we obtained a graviton mass constraint $m_{g} < 2.9 \times 10^{-21}$~eV which is comparable and consistent with the constraint $1.2 \times 10^{-22}$~eV given recently by the LIGO collaboration from an analysis of gravitational wave signal corresponding to a binary black hole coalescence.
Speaker: Prof. Alexander Zakharov (leading researcher)
• 16:00
Quantum vacuum and virtual gravitational dipoles: a common explanation of dark matter, dark energy and matter-antimatter asymmetry in the Universe? 15m
We present the consequences of the working hypothesis that quantum vacuum fluctuations are virtual gravitational dipoles, what might be, if for instance, particles and antiparticles have the gravitational charge of the opposite sign. The hypothesis of virtual gravitational dipoles permits to consider the Standard Model matter (i.e. matter composed from quarks and leptons interacting through the exchange of gauge bosons) as the only matter-energy content of the Universe. The phenomena usually attributed to hypothetical dark matter, may be considered as a consequence of the local gravitational polarization of the quantum vacuum by the immersed baryonic matter; apparently, the galactic halo of dark matter can be replaced by the halo of the polarized quantum vacuum. Globally quantum vacuum may be considered as a cosmological fluid which during expansion of the Universe converts from a fluid with negative pressure, allowing an accelerated expansion of the Universe, to a fluid with zero pressure (physically it means the end of the accelerated expansion). In addition, as a consequence of hypothesis of virtual gravitational dipoles together with the gravitational version of the Schwinger mechanism, we may live in a cyclic universe with cycles alternatively dominated by matter and antimatter. At least mathematically there is no the initial singularity, there is no need for the cosmic inflation and there is an amusing explanation of the matter-antimatter asymmetry in the universe: our universe is dominated by matter because the previous cycle was dominated by antimatter (and the next cycle would be dominated by antimatter again).
Speaker: Dragan Hajdukovic (Institute of Physics, Astrophysics and Cosmology)
• 16:15
Is the Wheeler – DeWitt equation more fundamental than the Schrödinger equation? 15m
The Wheeler – DeWitt equation was proposed 50 years ago and until now it is a cornerstone of most approaches to quantization of gravity. One can find in the literature the opinion that the Wheeler – DeWitt equation is even more fundamental than the basic equation of quantum theory, the Schrödinger equation [1]. We still should remember that we are in the situation when no observational data can confirm or reject a fundamental status of the Wheeler – DeWitt equation, so we can give just indirect arguments in favor of or against it, grounded on mathematical consistency and physical relevance. I shall present the analysis of the situation and comparison of the standard Wheeler – DeWitt approach with the extended phase space approach to quantization of gravity [2]. In my analysis I suppose, firstly, that the future quantum theory of gravity must be applicable to all phenomena from the early Universe to quantum effects in strong gravitational fields, in the latter case the state of the observer (a choice of a reference frame) may appear to be significant. Secondly, I suppose that the equation for the wave function of the Universe must not be postulated but derived by means of a mathematically consistent procedure, which exists in path integral quantization. Thirdly, when applying this procedure to any gravitating system, one should take into account features of gravity, namely, non-trivial spacetime topology and possible absence of asymptotic states. The Schrödinger equation has been derived early for cosmological models with a finite number of degrees of freedom [3], and just recently it has been found for a spherically symmetric model which is a simplest model with an infinite number of degrees of freedom. The structure of the Schrödinger equation and its general solution appears to be very similar in these cases. The obtained results give grounds to say that the Schrödinger equation retains its fundamental meaning in constructing quantum theory of gravity. [1] C. Rovelli, *Class. Quantum Grav*. **32** (2015) 124005. [2] V. A. Savchenko, T. P. Shestakova, G. M. Vereshkov, *Gravitation & Cosmology* **7** (2001), P. 18-28; *ibid*. P. 102 – 116. [3] V. A. Savchenko, T. P. Shestakova, G. M. Vereshkov, *Int. J. Mod. Phys*. **A14** (1999), P. 4473 – 4490; V. A. Savchenko, T. P. Shestakova, G. M. Vereshkov, *Int. J. Mod. Phys*. **A15** (2000), P. 3207 – 3220.
Speaker: Dr. Tatyana Shestakova (Department of Theoretical and Computational Physics, Southern Federal University)
• 16:30
High temperature limit of the Standard Model due to gauge group contraction 15m
The high-temperature limit of Standard Model generated by the contractions of gauge group $SU(2)$ of Electroweak Model and gauge group $SU(3)$ of Quantum Chromodynamics is discussed. Contraction parameters of both gauge groups are taken identical and tending to zero when temperature increase. Properties of the elementary particlies change drastically at the infinite temperature: all particles lose masses, all quarks have only one color degree of freedom, particles of different kind do not interact. The Standard Model passes in this limit through several stages, which are distinguished by the powers of contraction parameters. For any stage the intermediate models with the exact Lagrangians are presented. This could solve the hierarchy problem. The developed approach can be considered as the evolution of Standard Model in the early Universe starting from Planck scale.
Speaker: Prof. Nikolai Gromov (Institute of Physics and Mathematics, Komi Science Center UrD RAS)
• 16:45
Cosmological and astrophysical magnetic fields in turbulent matter 15m
We study the evolution of cosmological and astrophysical magnetic fields driven by the chiral magnetic effect and accounting for the turbulence of background matter. We start with the consideration of the physics concepts underlying the proposed model, such as the chiral magnetic effect (including the case when the electroweak interaction with background matter is present), the relativistic hydrodynamics, the magnetic helicity, and the modified Faraday equation. Then we discuss the model to take into account the turbulent motion of matter in the description of the evolution of the magnetic field. On the basis of this model we derive the new kinetic equations for the spectra of the magnetic energy and the magnetic helicity accounting for the chiral magnetic effect. Out results are compared with the findings of earlier studies. As one of the applications of this model we discuss the evolution of magnetic fields in the early universe after the electroweak phase transition. For this purpose, the basic kinetic equations rewritten in conformal variables are supplemented by the equation for the evolution of the chiral imbalance. Basing on the solution of the obtained system, we find the dependences of the chiral imbalance, the magnetic field strength, and the magnetic helicity on the temperature of the cooling universe. Another example illustrating the developed model consists in the description of small-scale magnetic fields generated in quark matter, taking into account the electroweak interaction of quarks. For this purpose, the system of the basic equations is supplemented by the corresponding correction to the chiral magnetic effect. The evolution of magnetic fields described in this model is applied to explain the bursts of highly magnetized compact stars known as magnetars. References 1. M. Dvornikov, V.B. Semikoz, The influence of the turbulent motion on the chiral magnetic effect in the early universe, Phys. Rev. D 95, 043538 (2017), arXiv:1612.05897. 2. M. Dvornikov, Magnetic fields in turbulent quark matter and magnetar bursts, arXiv:1612.06540.
Speaker: Dr. Maxim Dvornikov (Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN))
• 17:00
Supergravity contributions in non-minimally coupled inflationary models 15m
We made a systematic study of supergravity contributions relevant for inflationary models in Jordan frame supergravity. In a special class of Jordan frame, the scalar potential separates into a tree-level term and a supergravity contribution term, which is potentially dangerous for sustaining inflation. If during inflation the vacuum energy is mainly due to the F-term of an auxiliary non-inflaton field, the supergravity corrections to the scalar potential are generically suppressed or may even vanish if the superpotential vanishes along the inflationary trajectory. However, if the F-term of inflaton dominates the vacuum energy, supergravity contributions are generically comparable to global supersymmetric contributions. In addition, the non-minimal coupling significantly impacts inflationary models depending on the size and sign of this coupling. In this connection the phenomenology of some representative models are discussed.
Speaker: Mr. Kumar Das (Senior Research Fellow)
• 17:15
Evolution of the Universe caused by the averaged potential of the quantum scalar field 15m
We evaluate the quantum averaged potential of the scalar field minimaly coupled to gravity and solve the Riccati equation for the Hubble parameter that follows from the Einstein equations.
Speaker: Prof. Vladimir Belokurov (Lomonosov Moscow State University and Institute for Nuclear Research of RAS)
• 17:30
Relativistic anisotric stars with the polytropic equation of state in general relativity 15m
Spherically symmetric relativistic stars with the polytropic equation of state, which possess the local pressure anisotropy, are considered in the context of general relativity. The generalized Lane-Emden equations are derived for the arbitrary anisotropy parameter. They are then applied to some special ansatz for the anisotropy parameter in the form of the differential relation between the anisotropy parameter and the metric function *ν*. The analytical solutions of the obtained equations are found for incompressible fluid stars and then used for getting their mass-radius relation, gravitational and binding energy. Also, the equation for studying the dynamical stability of incompressible fluid stars with respect to radial oscillations is obtained and analyzed.
Speaker: Alexander Isayev (Kharkov Institute of Physics and Technology)
• 17:45
Detection of tensor and scalar gravitational waves by means of interferometric antennas 15m
There is presented a new method for the determination of a polarization state of an incoming gravitational wave (GW) by means of interferometric antennas when the source localisation is known. Modern gravitational theories predict the existence of several polarization states of gravitational waves including scalar and tensor modes. The method is based on the analysis of antennas beam patterns different for different polarization states as well as a comparison between GW strains at each couple of detectors. A network of three and more working interferometric antennas localises a position of the GW source in a point on the sky, therefore providing the possibility to recognise a polarization mode of an incoming GW. The recent announcement on 1st August 2017 about the start of the new observation run with three interferometric antennas of LIGO-Virgo Collaboration opens a new possibility to test a theory of gravitation.using the proposed method.
Speaker: Ms. Liudmila Fesik (Saint Petersburg State University)
• 18:00
Neutrino asymmetry in a hot plasma of early Universe 15m
The neutrino asymmetry can be generated due to the Berry curvature in the momentum space that modifies the known Boltzmann equations for neutrinos and antineutrinos interacting with plasma in Standard Model both before and after electroweak phase transition in early Universe. If magnetic fields are unstable due to neutrino asymmetry one can put a lower bound on that asymmetry in agreement with the known (Dolgov et al. 2002) upper (BBN) bound $\xi_{\nu_e}\leq 0.07$ for electron neutrinos.
Speaker: Dr. Victor Semikoz (IZMIRAN)
• 15:45 18:05
Heavy Ion Physics - 2 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Igor Altsybeev (St.Petersburg State University)
• 15:45
Femtoscopy with ALICE at the LHC 20m
Femtoscopy allows to measure the space-time characteristics of particle production using correlations resulting from the effects of quantum statistics and final state interactions. We present the recent results of femtoscopic analyses for different two-particle systems measured by ALICE in Pb-Pb, p-Pb and pp collisions, pointing out the similarities and differences between small and large systems. Results for kaons provide a cross-check of the information about the dynamics of the source and the importance of the hadronic rescattering phase. The femtoscopic studies of baryon-(anti-)baryon, and kaon pairs provides an unique opportunity to extract the strong interaction parameters and cross-sections of these particle pairs.
Speaker: Dr. Ludmila Malinina (SINP MSU-JINR)
• 16:05
Two-pion and two-kaon femtoscopic correlations in Au+Au collisions at $\sqrt{s_{NN}}$ from STAR 20m
Measurement of femtoscopic correlations provides information about spatial and temporal parameters of the particle emission region at kinetic freeze-out. In this talk we present the measurement of two-pion and two-kaon femtoscopic correlations in 200 GeV Au+Au collisions at RHIC. The collision centrality and transverse momenta dependence of the three-dimensional radii, $R_{out}$, $R_{side}$ and $R_{long}$ will be discussed.
Speaker: Mr. Grigory Nigmatkulov (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
• 16:25
Measurement of neutral mesons and direct photons with ALICE at the LHC 20m
Speaker: Dr. Dmitri Peresunko (Kurchatov Institute)
• 16:45
Measurement of hadronic resonances with ALICE at the LHC 20m
The ALICE experiment has measured production of hadronic resonances such as $\rho^{0}$(770), K*(892), $\phi$(1020), $\Sigma$(1385)$^{\pm}$, $\Lambda$(1520) and $\Xi$(1530)$^{0}$ in pp, p-Pb and Pb-Pb collisions at various energies. Due to their short lifetimes, the hadronic resonances are sensitive to the re-scattering and regeneration processes occurring in the time interval between the chemical and the kinetic freeze-outs in heavy-ion collisions. Measurement of resonance yields and their ratios to the long-lived particles are used to study properties and lifetime of the late hadronic phase. The resonances, which differ by mass and quark content, also provide insights on the mechanisms driving the multiplicity-dependent enhancement of strangeness production and can be used to study parton energy loss and anomalous baryon-to-meson ratios at intermediate transverse momentum. Heavy-ion collisions are used to study resonance production in the hot and dense matter, while multiplicity dependence measurements in small systems are used to establish a reference and search for onset of collective phenomena. We present the most recent ALICE results on resonance production including the latest results from the LHC Run 2. These results, which include centrality- and multiplicity-differential transverse momentum spectra, integrated yields, mean transverse momenta, particle ratios and nuclear modification factors, are compared to the results for other hadron species, to lower energy experiments and predictions from theoretical models.
Speaker: Dr. Victor Riabov (PNPI, MEPHI)
• 17:05
Measurement of W and Z boson production in 5 TeV pp, p+Pb and Pb+Pb collisions with the ATLAS detector 20m
Speaker: Mr. Piotr Janus (AGH University of Science and Technology (PL))
• 17:25
Quarkonia measurements in 5 TeV heavy-ion collisions with the ATLAS detector 20m
The in-medium suppression of heavy quarkonia production in heavy-ion collisions, with respect to proton-proton collisions, serves as a sensitive probe for studying the QGP. A full assessment of the suppression requires understanding of hot and cold nuclear matter effects using A-A and smaller sized p-A collision systems, respectively. Based on proton-lead collision data collected in 2013 and proton-proton and lead-lead collision data collected in 2015 at the LHC, it is possible to study J/psi, psi(2S) and Upsilon(nS) production using the ATLAS detector. The charmonium states are further separated into contributions from B-hadron decays and prompt production to study effects of charmonium suppression for B-hardons traversing the hot medium. Several measurements such as nuclear modification factors and excited-to-ground state ratios will be presented in this talk.
Speaker: Mr. Nikita Smirnov (NRNU MEPhI)
• 17:45
Open Charm measurements at CERN SPS energies with the new Vertex Detector of the NA61/SHINE experiment 20m
The heavy-ion programme of the NA61/SHINE experiment at CERN SPS has been expanded to allow precise measurements of exotic particles with short lifetime. The study of open charm meson production provides an efficient tool for new detailed investigations of the properties of hot and dense matter formed in nucleus-nucleus collisions. In particular, it opens new possibilities for studies of such phenomena as in-medium parton energy loss and quarkonium dissociation and possible regeneration, thus bringing new information to probe deconfinement. The new Vertex Detector of the NA61/SHINE experiment for measurements of very rare processes of open charm production in nucleus-nucleus collisions at the SPS was designed to meet the challenges of track registration and of very precise spatial resolution in primary and secondary vertex reconstruction. A small-acceptance version of the Vertex Detector SAVD (Small Acceptance Vertex Detector) was installed last year with a Pb target in the Pb beam of 150A GeV/c momentum, and a modest set of data were collected. The main goal of the ongoing data analysis was to observe a signal from the D0 meson. The status of this analysis will be presented, discussing a number of challenges related to the tracking in the inhomogeneous magnetic field, the matching of SAVD tracks to TPCs tracks, and the extraction of physics results.
Speaker: Ms. Anastasia Merzlaya (Saint-Petersburg State University)
• 15:45 18:15
Neutrino and astroparticle physics - 1 Moskvorechye-2 hall

### Moskvorechye-2 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Mr. Valery Sinev (INR RAS)
• 15:45
The “Carpet-3” shower array for search of diffuse gamma radiation with energy Eγ>100TeV 15m
A.U. Kudzhaev for the "Carpet-3" collaboration. At present at the Baksan Neutrino Observatory of INR RAS a preparation of experiment for measuring a flux of cosmic diffuse gamma radiation with energy higher than 100TeV (experiment “Carpet-3”) is carried out. The preparation of the experiment will be propose of enlarge the area both of muon detector and ground part of shower array. At the present stage the plastic scintillation counters with total continuous area 410m are installed in the muon detector (MD) underground tunnels and they are totally equipped with electronics. A tuning of counters and electronics are made. The six modules for shower detectors from twenty ones already are placed on surface of absorber MD. It has been created the new liquid scintillation detector for modules of ground part of array, the characteristics which are presented. It is shown that the “Carpet-3” shower array will have the best sensitivity to the flux of primary gamma rays with energies in the range 100TeV-1PeV and will be quite competitive in gamma-ray astronomy in such energies.
Speaker: Dr. Aleksandr Kudzhaev (Baksan Neutrino Observatory, INR of RAS)
• 16:00
DAMPE and its first year in orbit 15m
The DArk Matter Particle Explorer (DAMPE), is a space mission within the strategic framework of the Chinese Academy of Sciences, resulting from a collaboration of Chinese, Italian, and Swiss institutions, is a new addition to the growing number of particle detectors in space. It was successfully launched in December 2015 and has commenced nominal science operations since shortly after launch. Lending technologies from its predecessors such as AMS and Fermi-LAT, it features a powerful segmented electromagnetic calorimeter which thanks to its 31 radiation lengths enables the study of charged cosmic rays in the energy domain of up to 100 TeV and gamma rays of up to 10 TeV. The calorimeter is complemented with a silicon-tungsten tracker converter which yields a comparable angular resolution as current space-borne pair-conversion gamma-ray detectors. In addition, the detector features a top anti-coincidence shield made of segmented silicon plastic scintillators and a boron-doped plastic scintillator on the bottom of the instrument to detect delayed neutrons arising from cosmic ray protons showering in the calorimeter. In this contribution I will present an overview of the mission and summarize the latest results in the domain of charged cosmic rays, gamma rays and heavy ions that were obtained using 1 year of orbit data.
Speaker: Dr. Fabio Gargano (Istituto Nazionale di Fisica Nucleare - Bari)
• 16:15
Testing of the EPOS LHC, QGSJET01, QGSJETII-03 and QGSJETII-04 hadronic interaction models via help of the atmospheric vertical muons spectra 15m
The recent results of the very precise measurements of the primary cosmic protons and helium nuclei energy spectra by AMS-02, PAMELA, CREAM, ATIC-2 and some other collaborations and some rather accurate estimates of these proton and helium nuclei energy spectra generated in SNR allow us to elaborate the new high acuracy original approximation of the pimary nucleon energy spectra. As the acuracy of this approximation is rather high we can use it to test various models of hadronic interactions with the help of atmospheric muon energy spectra. The atmospheric vertical muon energy spectra have been calcullated in terms of the EPOS LHC, QGSJET01, QGSJETII-03 and QGSJETII-04 models in the energy range $10^{2} \div 10^{5}$ GeV with help of the CORSIKA package and this new approximation of the primary nucleon spectrum. Results of calculations have been compared with the muon spectra observed by collaborations L3+Cosmic, LVD and MACRO. The analysis has shown that all models predict approximately two times lower intensity of the muon energy spectra. As these muons are products of decays of the most energetic $\pi^{\pm}$ and $K^{\pm}$ mesons in the atmosphere, we can conclude that production of these $\pi^{\pm}$ and $K^{\pm}$ mesons is underestimated by EPOS LHC, QGSJET01, QGSJETII-03 and QGSJETII-04 models.
Speaker: Mr. Anton Lukyashin (ITEP, NRNU MEPhI)
• 16:30
MEASUREMENTS OF THE COSMIC-RAY ELECTRON AND POSITRON SPECTRUM AND ANISOTROPIES WITH THE FERMI LAT 15m
The Large Area Telescope onboard the Fermi satellite is a pair-conversion telescope for high-energy gamma rays of astrophysical origin. Although it was designed to be a high-sensitivity gamma-ray telescope, the LAT has proved to be an excellent electron/positron detector. It has been operating in low Earth orbit since June 2008 and has collected more than 16 millions of cosmic-ray electron and positron (CRE) events in its first seven years of operation. The huge data sample collected by the LAT enables a precise measurement of the CRE energy spectrum up to the TeV region. A search for anisotropies in the arrival directions of CREs was also performed. The upper limits on the dipole anisotropies probe the presence of nearby young and middle-aged CRE sources.
Speaker: Dr. Francesco Loparco (Bari University and INFN)
• 16:45
On the possibility of the existence of friable nuclear matter in the form of nuclear-molecular crystals of the Wigner type in the helium-hydrogen plasma of solar interiors 15m
The first version of the theoretical model of friable nuclear matter is developed, which is based on the resonance interaction of protons with $\alpha$-particles. These interactions, manifested in Laboratory experiments in the form of unstable nuclei such as ${}^5{\rm Li}$, ${}^6{\rm Be}$ and others, can lead to the formation of quasistationary and, possibly, even stable nuclear-molecular crystal structures connected by correlated pairs of protons in the conditions of solar interiors. In such nuclear-molecular crystals, the catalytic acceleration of the *pp*-reaction and, as a consequence, the appearance of new branches of the hydrogen chain localized in space are possible. It is expected that the total energy release in these localized branches, although much less than the luminosity of the Sun, can play an important role in the formation of solar activity processes. This report was dedicated to the 100th anniversary of the birth of Academician G. T. Zatsepin.
Speaker: Dr. Yuri Kopysov (INR RAS)
• 17:00
LZ: A Second Generation Experiment for Direct Detection of Dark Matter 15m
Experiments which search for dark matter by detecting its extremely weak interactions with nuclei have employed a variety of techniques. The technologies developed by this set of "direct detection" experiments have matured and are now available for scaling up to much larger and more sensitive detectors. The LZ experiment, which utilizes the two-phase xenon time projection chamber technique, is eminently suitable for such scaling. LZ will instrument 10 tonnes of liquid xenon, of which 5.6 tonnes will serve as the fiducial target mass. LZ has achieved final approval from funding agencies and is in the process of construction. I will present design details, background estimates and projected sensitivities for the experiment.
Speaker: Prof. Mani Tripathi (University of California, Davis)
• 17:15
Study of cosmic ray sources using data on extragalactic diffuse gamma-ray emission 15m
In space, ultra-high energy cosmic rays interact with cosmic microwave background and thus dissipate energy. This results in a lack of particles at energies about 10^20 eV at the Earth (GZK-effect) if cosmic rays come from distances of more than $\sim$100 Mpc. Another effect of interaction with cosmic microwave background is electromagnetic cascades that particles initiate in extragalactic space. Assuming that sources of ultra-high energy cosmic rays are active galactic nuclei (AGN) we have calculated cosmic ray energy spectra at the Earth and intensity of cascade quanta produced. We consider several types of AGNs including the type in which supermassive black hole in AGN is surrounded by a superstrong magnetic field of 10^10 – 10^11 Gs. Proceeding from numerical results obtained and data by Pierre Auger Observatory, Telescope Array and by Fermi LAT we discuss the probable fraction of AGNs surrounded by superstrong magnetic fields.
Speaker: Dr. Anna Uryson (Lebedev Physical Institute RAS)
• 17:30
About cosmic ray sources 15m
It is commonly accepted that the main sources of cosmic rays in the Galaxy are the supernovae explosions. Protons, nuclei and electrons are accelerated by shock waves produced by supernovae explosions. According to theory, maximum energy of accelerated protons can be as much as 10^16 eV. For nuclei it is Z times higher where Z is a nucleus electric charge. Other sources of cosmic rays cold be active dwarf stars. In Galaxy there are about 4*10^11 stars and more than 90% of these stars are in the bottom part the main sequence of Gerzsprunger -Ressel diagram. Many of dwarf stars are very active and produce power stellar flares. The Sun is yellow dwarf star of G2 class. The power solar flares occur one per year and they accelerate protons up to energy about (10-20) GeV. Maximum energy released in power solar flares is about 10^32 ergs. Stellar flares on active red dwarf stars are observed more often (several times per day) and the energy released during such events can have a value about 10^36 ergs. It is possible that the energy of accelerated protons could be as high as 10^14 eV. The evaluations show that the stellar flares could provide the energy density in Galaxy equals to ~1 eV/cm^3. Many of dwarf stars are not so far from the solar system (as the luminosities of these stars are very low they can be observed at the distances less than 50 kpc). New data on spectra of galactic protons and alfa-particles in the energy range from 50 GeV up to several hundreds GeV obtained in space experiments of PAMELA and AMS-02 show the complex energy dependence of spectral index. These data support the suggestion on the existence of nearby cosmic ray sources. Cosmic rays accelerated in supernovae explosions (the distances about 1 kpc and more) are in Galaxy about 10^8 years/ So, their spectra have to be smoothed.
Speaker: Prof. Yuri Stozhkov (Lebedev Physical Institute, RAS)
• 17:45
From PAMELA mission to GAMMA 400 project – The indirect search for signatures of dark matter 15m
In 2008 the PAMELA magnetic spectrometer has discovered unpredicted abundance of the ratio of the galactic positron flux to the total positrons and electrons flux at high energies. It does not agree with the cosmic rays fluxes calculated using GALPROP routine. This abundance was called the “anomalous effect PAMELA” and one of the explanations of this effect was the appearance of the additional electrons and positrons flux due to annihilation or decay of the dark matter particles. Later the anomalous effect PAMELA was confirmed by the gamma-telescope Fermi/LAT and by the AMS-02 magnetic spectrometer. Now the new project GAMMA-400 has been preparing. The one of its main goals is a search for signatures of dark matter particles annihilation or decay producing gamma rays. The GAMMA-400 gamma-telescope will have better angular and energy resolutions and will be the next stage of the space gamma-telescopes development. At the present time the problem of the dark matter nature still remains the main challenge in high energy cosmo- and astrophysics.
Speaker: Dr. Nikolay Topchiev (Lebedev Physical Institute)
• Wednesday, 4 October
• 08:00 10:00
High Energy Physics - 2 Moskvorechye-1 hall

### Moskvorechye-1 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Alexey Drutskoy (MEPhI, ITEP)
• 08:00
Top quark measurements at ATLAS 25m
The top quark is the heaviest known fundamental particle. As it is the only quark that decays before it hadronizes, this gives us the unique opportunity to probe the properties of bare quarks at the Large Hadron Collider. This talk will present highlights of a few recent precision measurements by the ATLAS Collaboration of the top quark using 13 TeV and 8 TeV collision data: top-quark pair and single top production cross sections including differential distributions will be presented alongside top quark properties measurements. These measurements, including results using boosted top quarks, probe our understanding of top quark production in the TeV regime. Measurements of the top quark mass and searches for rare top quark decays are also presented.
Speaker: Mr. Sergio Grancagnolo (Humboldt University Berlin)
• 08:25
Lepton flavor violation in b-hadron decays in the LHC era 15m
We have studied the sensitivity of the CMS and LHCb experiments to lepton number violating decays of two b-hadrons: $\Lambda^{0}_{b}$ and $B^{0}_{s}$. We focus in the decay channels with two muons and additional hadronic activity. We show that the two experiments are sensitive to this type of process using the current luminosity recorded by them but also we show the perspectives for future periods of data taking from LHC collisions. Using a model with an additional Majorana neutrino we derive constraints on its coupling to the standard model particles and its mass based on the expected sensitivities by the CMS and LHCb experiments. It is clearly derived from this work that the findings of these two experiments would be competitive with the current experimental limits coming from other type of facilities.
Speaker: Dr. Jose Ruiz (Universidad de los Andes)
• 08:40
Recent Charmonium results at BESIII 15m
BESIII is operated at the Being electron positron collider (BEPCII), which reaches a peak luminosity of 1.0x10^33 /cm^2/s at the center-of mass energy of 3770 MeV. With the world’s largest sample accumulated in the tau-charm region of e+e- collision, the recent results for charmonium decays will be presented.
Speaker: Dr. Yang ZHANG (Institute of high energy physics, Beijing, China)
• 08:55
Belle II Physics Plans 20m
The Belle II experiment is the next generation of B-factory experiment at KEK in Tsukuba, Japan. The construction of the SuperKEKB accelerator and the Belle II detector is now in progress and is aiming for the first physics run in 2018. In the presentation, the key physics goal of the experiment and the current status of the accelerator and the detector will be reported.
Speaker: Prof. BIPUL BHUYAN (Indian Institute of Technology Guwahati)
• 09:15
Measurement of the CKM phase $\phi_1$ in $b \to c \overline{u} d$ transitions at Belle 15m
Two recent results on the time-dependent CP violation in $b \to c \overline{u} d$ transitions are discussed. The first one is joint Belle and BaBar analysis of the $\overline{B}{}^0\to D^0_{CP} h^0$ decays, where $h^0$ is a light unflavored meson and $D^0$ meson is reconstructed in a CP specific final state. The second one is analysis of the $\overline{B}{}^0\to D^0 h^0$, $D^0 \to K_S^0\pi^+\pi^-$ decays at Belle. Time-dependent analysis of the $b \to c \overline{u} d$ transitions provides the most precise measurement of the $\cos{2\varphi_1}$, and it is almost free of the hadronic uncertainties. It also provides an approach for measurement of the $\sin{2\varphi_1}$, complimentary to the $b \to c\overline{c}s$ analysis. Future analysis of the $b \to c \overline{u} d$ transitions with large data sets of LHCb and Belle II experiments will provide an essential test of the Standard Model.
Speaker: Mr. Vitaly Vorobyev (BINP)
• 09:30
Search for Multi-quark Exotic States with Heavy Flavor at DZero Experiment 15m
Recent results of the search for multi-quark exotic states with c- and b-quarks at DZero experiment (FNAL, USA) are presented in this talk. This includes an evidence of the possible tetraquark state X(5568) decaying to B_s \pi in the channels with hadronic and semileptonic decay of B_s meson and a search for the possible pentaquark states in J/\psi \Lambda invariant mass spectrum.
Speaker: Dr. Aleksei Popov (NRC Kurchatov Institute, IHEP, Protvino, Russia)
• 09:45
Overview of CPV parameter $\phi_{s}$ determination 15m
The one of main goals of the LHCb experiment is the measurement of the mixing-induced CP-violating phase phi_s in the Bs-Bsbar system. It has been measured exploiting the Run l data set, using several decay channels. The most recent results obtained analyzing Bs0->J/psi K+K- candidates in the K+K- mass region above the phi(1020) resonance are presented. However, the precision of phi_s is still limited by the statistics. Also the measurements using the same final state with the K+K- mass at the phi(1020) and Bs0->J/psi pi+pi-, as well as using the Bs0->Psi(2S) phi decay will be discussed.
Speaker: Ms. Varvara Batozskaya (National Centre for Nuclear Research)
• 08:00 10:00
Neutrino and Astroparticle Physics - 2 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Yury Kudenko (INR RAS)
• 08:00
New limits on heavy neutrinos from NA62 15m
The NA62 experiment at CERN collected a large sample of charged kaon decays in flight with a minimum bias trigger in 2007. Upper limits on the rate of the charged kaon decay into a muon and a heavy neutral lepton (HNL) obtained from this data are reported for a range of HNL masses. The NA62 experiment has collected further data in 2015 with a completely new and improved detector. New limits on heavy neutrinos from kaon decays into electron and HNL will be presented.
Speaker: Mr. Sergey Kholodenko (NRC «Kurchatov Institute» - IHEP)
• 08:15
Recent results from the T2K experiment 15m
The long-baseline world-leading experiment T2K (Tokai-to-Kamioka) studies neutrino oscillations and other neutrino properties. The experiment uses an intense beam of muon (anti)neutrinos produced at J-PARC in Japan and measured by the near (INGRID, ND280) and far (Super-Kamiokande) detectors. Currently the experiment has collected statistics corresponding to 14.93 $\times 10^{20}$ POT (protons on target) in neutrino-mode running and 7.62 $\times 10^{20}$ POT in antineutrino-mode. Simultaneous analysis of appearance and disappearance channels of (anti)neutrino oscillations allows one to measure the following parameters that govern the oscillations: $sin^2(\theta_{23})$,$\:$ $sin^2(\theta_{13})$,$\:$ $|\Delta m_{32}^2|$, $\:$$\delta_{CP}$$\:$ and the mass hierarchy. Combined with the measurements from reactor experiments the T2K data provide an exclusion of the CP conservation hypothesis at the 2$\sigma$ level. In this talk the recent status and results from the T2K experiment will be discussed as well as the future plans of the project.
Speaker: Ms. Maria Antonova (Instituto de Física Corpuscular, CSIC and UV)
• 08:30
Baby MIND: last results from T9 beam line at CERN. 15m
T2K (Tokai-to-Kamioka) is a long-baseline neutrino oscillation experiment in Japan. T2K have non-canceling systematic errors on neutrino cross-sections, because of different primary nuclear targets of Super-K (water) and T2K off-axis near detector, ND280 (scintillator, hydrocarbon). In order to reduce this uncertainty a new WAter-Grid-And-SCintillator detector (WAGASCI) has been developed. A magnetized iron neutrino detector (Baby MIND) will be used to measure momentum and charge identification of the outgoing muons from charged current interactions. The Baby MIND modules are composed of magnetized iron plates and long plastic scintillator bars read out at the both ends with wavelength shifting fibers and silicon photomultipliers. The front-end electronics board has been developed to perform the readout and digitization of the signals from the scintillator bars. 75-tonne neutrino detector (Baby MIND) with a new magnetization scheme, was tested in the Proton Synchrotron (PS) beam. The obtained results are presented in this paper.
Speaker: Mr. Aleksanrd Mefodiev (INR RAS)
• 08:45
Search for heavy neutrino in leptonic decays of K+ 15m
A high statistics data sample of the $K^{+} \to \mu^{+} \nu_{\mu}$ decay was recorded in 2012 by OKA collaboration. The missing mass analysis was performed to search for a decay channel $K^{+} \to \mu^{+} \nu_{H}$ with a stable heavy neutrino in the final state. The obtained missing mass spectrum does not show peaks which could be explained by existence of stable heavy neutrinos in the mass range (220 < $m_{ν_{H}}$ < 375) MeV/$c^2$. Instead, we update upper limits on the branching ratio and on the value of the mixing element $|U_{μH}|^2$.
Speaker: Dr. Alexander Sadovsky (NRC "Kurchatov Institute" - IHEP)
• 09:00
The ICARUS experiment 15m
The 760 ton liquid argon ICARUS T600 detector performed a successful three-year physics run at the underground LNGS laboratories, studying neutrino oscillations with the CNGS neutrino beam from CERN, and searching for atmospheric neutrino interactions in cosmic rays. A sensitive search for LSND like anomalous nu_e appearance was performed, contributing to constrain the allowed parameters to a narrow region around Δm2~eV2, where all the experimental results can be coherently accommodated at 90% C.L. The T600 detector will be redeployed at Fermilab, after a significant overhauling, to be exposed to the Booster Neutrino Beam acting as the far station to search for sterile neutrino within the SBN program. The proposed contribution will address ICARUS LNGS achievements and the ongoing analyses also finalized to the next physics run at Fermilab.
Speaker: Prof. Daniele Gibin (Università di Padova and INFN Sezione di Padova)
• 09:15
COHERENT Experiment: CENNS-10 detector 15m
CENNS-10 is a single-phase liquid Ar detector used for detection and studying of a coherent elastic neutrino-nucleus scattering (CEvNS) off Ar nuclei within the COHERENT Experiment. The detector has been upgraded in summer 2017. An updated description of CENNS-10, its current status and future plans will be presented.
Speaker: Mr. Alexander Kumpan (National Research Nuclear University MEPhI)
• 09:30
The reactor antineutrino anomaly and low energy threshold neutrino experiments 15m
Short distance reactor antineutrino experiments measure an antineutrino spectrum a few percent lower than expected from theoretical predictions. In this work we study the potential of low energy threshold reactor experiments in the context of a light sterile neutrino signal. We discuss the perspectives of the recently detected coherent elastic neutrino-nucleus scattering in future reactor antineutrino experiments. We find that the expectations to improve the current constraints on the mixing with sterile neutrinos are promising. We also analyse the measurements of antineutrino scattering off electrons from short distance reactor experiments. In this case, despite the statistics is not competitive with inverse beta decay experiments, the restrictions play an important role when we compare it with the Gallium anomaly.
Speaker: Dr. Estela A. Garces (CINVESTAV)
• 09:45
Experiment Neutrino-4 on search for sterile neutrino at SM-3 reactor 15m
The experiment "Neutrino-4" started in 2014 on a model, then it was continued on a full-scale detector, and now, for the first time in the world, has provided the measurement result on dependence of the flux of reactor antineutrinos on the distance of 6-12 meters from the center of the reactor. One of the main problems is the correlated background from fast neutrons caused by space radiation. Attempts to suppress the background of fast neutrons by sectioning the detector have given the required result. The relation of effect/background has improved from 0.3 to 0.6. As a result, measurements of the difference in the counting rate of neutrino-like events (reactor ON-reactor OFF) for a full-scale detector have been obtained as dependence on distance from the reactor center. Besides, the spectrum of prompt signals of neutrino-like events has been presented. The fit of experimental dependence with the law $1/L^{2}$ , however, does not give an absolutely satisfactory result. The goodness of that fit is a little more than 10%, i.e. the confidence level is about 90% in deviation from the law $1/L^{2} (1.64\sigma)$. The similar situation arises in the analysis of spectrum dependence of prompt signals, which is also 90% of confidence level. Of course, the joint deviation, demanding identical parameters $\Delta m_{14}^{2} =0.7 \div 0.8~eV ^{2}$ and $sin^{2}(2\theta_{14})$=$0.10\div0.15$, increases the confidence level up to about 95% $(2\sigma)$. But it is still not enough for making statements on observation of the phenomenon, especially, such an important one as oscillations in a sterile state. At last, it is also impossible now to exclude possibility of influence of systematic errors on the final experimental result. Therefore, in future we would like to concentrate efforts on increase in accuracy of the experiment and control of possible systematic errors.
Speaker: Mr. Rudolf Samoilov (PNPI)
• 08:00 10:00
Nuclear physics - 1 Moskvorechye-2 hall

### Moskvorechye-2 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Dr. Alla Demyanova (NRC Kurchatov Institute, 1, Akademika Kurchatova pl., Moscow, 123182, Russia)
• 08:00
Unstable nuclei in dissociation of light stable and radioactive nuclei in nuclear track emulsion 15m
Study of the cluster structure of light nuclei including radioactive ones in relativistic-fragmentation processes is a topic of the project BECQUEREL which continues the tradition of use of the technique track emulsion (NTE). Such reactions are under study by means of NTE stacks longwise exposed to primary and secondary beams of relativistic nuclei of the JINR Nuclotron. Coherent dissociation of relativistic nuclei to narrow jets of fragments which is not featuring either slow fragments or mesons serves as a ground for studying nuclear clustering. Currently, contribution of the unstable nuclei 8Be and 9B in structure of 9Be, 10B and 12C is in a focus of the research. Highlights and recent advances reviewed in are summarized. Search for $\alpha$-particle triples in the second excited state of the 12C nucleus (the Hoyle state) in 12C dissociation is suggested. Reanalysis of 3.6 A GeV 12C dissociation is revealed 3$\alpha$-events corresponding to the Hoyle state. Recently exposed stacks of NTE pellicles exposed to 12C of 400 A MeV energy at the IHEP accelerator complex (Protvino) provide development of this study. Progress of analysis for the Hoyle state events will be presented.
Speaker: Dr. Pavel Zarubin (Joint Institute for Nuclear Research)
• 08:15
Spectroscopy of helium isotope 6He 15m
Spectroscopy of the heavy helium isotope He6 have been studied in reactions of stopped pion absorption by light nuclei. Experiment was performed at low energy pion channel of the LANL using two-arm semiconductor spectrometer. Search for nuclear states was performed in inclusive and correlative measurements of missing mass spectra. Excited states of the He6 were observed in two- and three body channels. A wide region of excitation energies studied in correlative measurements made possible to search for isobar-analog states and cluster resonances. Several high-excited states were observed for the first time. Some of these states are close to threshold energies. 6He excited state with Ex = 27.0(8) MeV observed in 10B(pion-,pt)X channel is an IAS candidate for 6H with Er $\sim$ 5.5 MeV.
Speaker: Dr. Boris Chernyshev (NRNU MEPhI)
• 08:30
Energy dependence of total cross sections for reactions with 6He, 6,9Li nuclei 15m
A series of experiments has been performed at Flerov Laboratory of Nuclear Reactions (JINR) on measurement of total cross sections for reactions 4,6He+28Si and 6,7,9Li+28Si in the beam energy range 5-40 A·MeV. The transmission method based on registration of energy loss in the material of ∆E detector (Si target) as well as registration of n-γ radiation by the 4π spectrometer was used. The interesting results were the unusual wide enhancement of total cross section for 9Li+28Si reaction in the energy range ~10-30 A·MeV as compared with 6,7Li+28Si reactions. The similar weaker behavior was found for 6He+28Si reaction as compared with 4He+28Si reaction. The microscopic approach based on the numeric solution of the time-dependent Schrödinger equation for the external neutrons of weakly bound projectile nuclei combined with the optical model is proposed for description of the observed effects. These are explained by the rearrangement of external neutrons and thus the increase of neutron probability density in the region between the two nuclei during their collision in the energy range ~10-30 A·MeV. The corrections to the nucleus-nucleus potential associated with the rearrangement of external neutrons were determined by integration of their probability density over the region between the two nuclei. The probability of leaving the elastic channel was calculated within the optical model. The calculated cross sections are in agreement with the experimental data on the total reaction cross sections for the studied nuclei.
Speaker: Mikhail Naumenko (Joint Institute for Nuclear Research)
• 08:45
Scission point calculations and physical treating of the “Ni-bump” in <sup>252</sup>Cf(sf) 15m
In a series of the experiments at different time-of-flight spectrometers of heavy ions we have observed manifestations of a new at least ternary decay channel of low excited heavy nuclei. Due to specific features of the effect, it was called collinear cluster tri-partition (CCT). The experimental results obtained initiated a number of theoretical articles dedicated to different aspects of the CCT. In the report we compare the theoretical predictions with our experimental data, only partially published so far. The developed model of one of the most populated CCT modes that gives rise to the so called “Ni-bump” is discussed.
Speaker: Prof. Yuri Pyatkov (MEPhI)
• 09:00
DELAYED MULTI-NEUTRON EMISSION IN HEAVY CA REGION 15m
I.N. Borzov 1,2* 1 National Research Centre “Kurchatov Institute”, 123182, Moscow, Russia 2 Bogolubov Laboratory of Theoretical Physics, Joint Institute of Nuclear Research, 141980, Dubna, Russia Performance of the global self-consistent models of nuclear beta decay is analysed. We compare the results of the interacting shell-model [1], continuum quasiparticle random phase approximation DF+CQRPA based on the Fayans functional [2], relativistic Hartry-Bogolubov QRPA [3], and Finite Amplitude Method [4] based on the Skyrme functional. All the frameworks include both the allowed Gamow–Teller and first-forbidden beta decays on the same microscopic footing. The beta-decay half-lives and delayed multi- neutron emission branchings are confronted for the “reference nuclides” near the major neutron shells-closures at N=50, 82. An emphasis is made on the share of the first-forbidden decays in the total rates. The results are also checked against the known hindrance factors and for consistency with available experimental decay schemes. A detailed beta decay study is performed for the K, Ca, Sc nuclides near the new neutron sub-shells at N=32, 34. In a view of recently discovered anomalous nuclear radii in heavy Ca isotopes [5], a special attention is payed to possible constraints imposed by the beta-decay strength functions, half-lives and delayed multi-neutron emission branchings on the strength of quasiparticle-phonon coupling. Taking an account of this effect has been found to be of prime importance for solving the problem of “Ca anomaly” [6]. [1] Q. Zhi, E. Caurier, J. Cuenca-Garc’ia, K. Langanke, G. Mart’inez-Pinedo, K. Sieja, Phys. Rev. C87, 025803 (2013). [2] I. N. Borzov.,Phys. Rev. C 67, 025802 (2003). [3] T. Marketin, L.Huther, G. Martinez-Pinedo., Phys. Rev. C 93, 025805 (2015). [4] M. T. Mustonen, T. Shafer, Z. Zenginerler, J. Engel., Phys.Rev. C 90, 024308 (2014). [5] A.Garcia-Ruiz et al., Nature, Physics 12, 594 (2016); http://dx.doi:10.1038/nphys3645. [6] E.E. Saperstein, I.N. Borzov, S.V. Tolokonnikov., JETP Letters, 104,218 (2016).
Speaker: Dr. Ivan Borzov (1 National Research Centre “Kurchatov Institute”, 123182, Moscow, Russia)
• 09:15
MESON PHOTOPRODUCTION ON NEUTRON IN THE A2 EXPERIMENT 15m
In March of 2017 the A2 collaboration at MAMI microtron (Mainz, Germany) has taken the data on meson photoproduction on liquid deuterium target at tagged photon energies up to 1.5 GeV. The main aim of the experiment is to perform a high statistics study of neutral pion and η-meson production on free neutron. The measurements will greatly improve the available database on neutron target and will help to disentangle the isoscalar and isovector electromagnetic couplings of N* and Δ* resonances [1]. New detectors added to improve trigger capability of Crystal Ball/TAPS facility are described as well as methods of neutron detection efficiency measurements started by ITEP group [2]. This data taking is a continuation of the previous one made at tagged photon beam with energies up to 800 MeV. The analysis of the experimental data are in progress. Preliminary results on total and differential cross sections are discussed as well as methods used for extraction of cross sections on neutron-target from deuteron data. In addition, we compared the experimental data with the predictions of SAID (USA) and MAID (Germany) partial wave analysis . References 1. I. Strakovsky et al. Progress in Neutron EM Couplings. AIP Conf.Proc. 1735 (2016) 040002. 2. M. Martemianov et al., A new measurement of the neutron detection efficiency for the NaI Crystal Ball detector. JINST 10 (2015), T04001.
Speakers: Mr. M Martemianov (ITEP) , Dr. V Kulikov (NRC Kurchatov Institute - ITEP)
• 09:30
Search for $2p$ decay of the first excited state of $^{17}$Ne 15m
Structure of nuclei located near and beyond the drip-lines plays important role in the explosive astrophysical processes. The problem of two-proton decay of the $^{17}$Ne first excited state is a good example of such situation. The two-proton radiative capture is a possible bypass of the $^{15}$O waiting point in the rp-process. The rate of this process drastically depends on the $2p/\gamma$ branching ratio of the $^{17}$Ne first excited state. The first excited state of $^{17}$Ne (with $J^\pi = 3/2^{-}$) is located only 344 keV above the 2p decay threshold, and its $2p$ decay partial width is much less then the gamma-decay partial width. The existing experimental threshold for the $2p/\gamma$ ratio (0.77 %) [1] is a few orders of magnitude greater than theoretical predictions made for this value (2.5e-6)[2]. Experiments aimed at the measuring such low branching ratio require development of special methods. In the recent experiment at the ACCULINNA [3] fragment-separator (Flerov Lab. JINR) the two-proton decay of the low-lying states of $^{17}$Ne populated in the $p(^{18}$Ne$,d)^{17}$Ne transfer reaction were studied. Original combined-mass method was used in the experiment. This method allows to get relatively good energy resolution ($\sigma\sim 130$ keV) without serious restriction on luminosity. As result, new $2p/\gamma$ ratio threshold for the $^{17}$Ne $3/2^{-}$ state equal 0.016(3)% was achieved, that is about fifty times less than existing value. The proposed method is promising for the study of the searched $2p$ decay partial width at level of $\Gamma_{2p}/\Gamma_\gamma \approx 10^{-6}$ [1] [M. J. Chromik, et. al., Phys.Rev. C55 (2002) 024313] [2] [L. V. Grigorenko, M. V. Zhukov, Phys.Rev. C76 (2007) 014008] [3] http://aculina.jinr.ru/
Speaker: Mr. Pavel Sharov (Joint Institute for Nuclear Research)
• 09:45
Microscopic description of pygmy dipole resonance in neutron-rich nuclei 15m
Using radioactive beams to explore nuclei far from the $\beta$-stability line has sparked intensive experimental and theoretical studies of neutron-rich nuclei during recent years [1]. In addition an attention has been devoted to effects of varying the ratio between the proton $Z$ and neutron $N$ numbers on different nuclear structure characteristics of nuclei deviated from their valley of $\beta$-stability. One of the phenomena associated with the change in $N/Z$ ratios is the pygmy dipole resonance (PDR). The PDR leads to the enhancement of dipole strength below the region of the isovector giant dipole resonance. The structure and dynamics of the PDR is one of the hot topics in nuclear physics. There is a special structure of the PDR which appears as a new collective motion in neutron-rich nuclei [2]. The other reason is the role of the PDR in nucleosynthesis. The PDR also induces noticeable effects on $(\gamma,n)$ cross section and on the r- process [3]. The quasiparticle random phase approximation (QRPA) with a self- consistent mean-field derived from Skyrme energy density functionals (EDF) is one of the most successful methods for studying the low-energy dipole strength, see e.g., Ref. [2]. Due to the anharmonicity of vibrations there is a coupling between one- phonon and more complex states. The main difficulty is that the complexity of calculations beyond standard QRPA increases rapidly with the size of the configuration space, and one has to work within limited spaces. Using a finite rank separable approximation for the residual particle-hole interaction derived from the Skyrme forces one can overcome this numerical problem [4-6]. As an illustration, we study the properties of the low-lying dipole states in the even-even nuclei $^{40-58}$Ca. Using the same set of the EDF parameters we describe available experimental data for $^{40,44,48}$Ca and give the prediction for $^{50-58}$Ca [7]. In particular, there is an impact of the coupling between one- and two-phonon states on low-energy $E1$ strength of $^{40,44,48}$Ca. We predict a strong increase of the summed $E1$ strength below 10 MeV, with increasing neutron number from $^{48}$Ca. [1] D. Savran, T. Aumann, A. Zilges, Prog. Part. Nucl. Phys. 70, 210 (2013). [2] N. Paar, D. Vretenar, E. Khan, G. Colò, Rep. Prog. Phys. 70, 691 (2007). [3] M. Arnould, S. Goriely, K. Takahashi, Phys. Rep. 450, 97 (2007). [4] Nguyen Van Giai, Ch. Stoyanov, V. V. Voronov, Phys. Rev. C57, 1204 (1998). [5] A. P. Severyukhin, V. V. Voronov, Nguyen Van Giai, Phys. Rev. C77, 024322 (2008). [6] A. P. Severyukhin, V. V. Voronov, Nguyen Van Giai, Eur. Phys. J. A22, 397 (2004). [7] N. N. Arsenyev, A. P. Severyukhin, V. V. Voronov, Nguyen Van Giai, Phys. Rev. C95, 054312 (2017).
Speaker: Dr. Nikolay Arsenyev (Bogoliubov Laboratory of Theoretical Physic, Joint Institute for Nuclear Research)
• 10:00 10:30
Coffee-break 30m
• 10:30 12:00
Plenary - 5 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Dr. Boris Chernyshev (National Research Nuclear University MEPhI)
• 10:30
Nuclear states with abnormal radii 30m
The radius of a nuclear state is one of the most important its characteristics. Presently there were developed some methods exploiting special features of the nuclear reactions leading to the short – lived excited states and allowing determination of their radii. Comparison of the data with the predictions of different theoretical models led to critical evaluation of the latter and getting a series of new and unexpected results. Two problems, an ambitious popular alpha-particle condensation model and formation of nucleon halos in the isobar – analog states were discussed here. It was shown that one might speak no more than about the “ghost” of condensation in the first case. As to the second one some open problems appear, and further studies are needed.
Speaker: Prof. Alexey Ogloblin (National Research Center «Kurchatov Institute»)
• 11:00
SUPER HEAVY ELEMENTS: Synthesis and Properties 30m
The existence of a region of hypothetical Super Heavy Elements (SHE) forming region (island) with high stability in the vicinity of the doubly magic nucleus $^{298}$114 was postulated in the mid-1960s. After about 30 years unsuccessfully attempts search for super heavy elements in nature or produced them in various reactions. They have synthesized in nuclear fusion of rare isotopes of trans-uranium elements and $^{48}$Ca projectile. More than 52 neutron-rich nuclei including the isotopes of the new element 113-118 and their α-decay products neutron-rich isotope of element 104-112 where produced in this reactions for the first time. A significant increase in the stability of the SHN with the number of neutrons, their relatively high cross sections caused their fission barriers; scenario and decay characteristics of new nuclides appeared a direct proof of the existence of a region (an island) of stability among super heavy elements. New nuclides with Z> 40% larger than that of Bi show an impressive extension in nuclear survival: the nuclear map have extended up to mass number 294, the 7th row of the Periodic Table have completed. The prospects of studies nuclear and atomic properties of the heaviest elements are considered taking into account the new accelerator complex "Super Heavy Elements Factory".
Speaker: Prof. Yuri Oganessian (Joint institute for Nuclear Research (JINR))
• 11:30
The upgrades of the CMS detector in view of High Luminosity LHC operation 30m
Speaker: Prof. Tiziano Camporesi (CERN)
• 12:00 13:00
Lunch 1h
• 13:00 15:00
Plenary - 6 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Mikhail Skorokhvatov (MEPhI/NRC KI)
• 13:00
Coherent elastic neutrino-nucleus scattering – the newly observed type of neutrino interaction. 30m
This neutral current neutrino interaction with atomic nucleus (CENNS) was predicted in the Standard Model 43 years ago. It takes place when the momentum transfer from neutrino to atomic nucleus is small and neutrino interacts with the nucleus as a whole. This interaction hasn’t been observed for the long time after prediction because of the necessity to detect the tiny energy of a recoil nucleus in a massive target. The talk presents a review of the experimental technique for observation of the CENNS including the program of the COHERENT collaboration where it has been discovered recently. Future plans on study of this process and its use for nuclear reactor monitoring are discussed.
Speaker: Dr. Dmitry Akimov (ITEP and MEPhI)
• 13:30
Neutrino Physics at Kalinin Nuclear Power Plant 2002 – 2017 30m
The results of the research in the field of neutrino physics obtained at Kalinin nuclear power plant during 15 years are presented. The investigations were performed in two directions. The first one is experiments for search for neutrino magnetic moment GEMMA I and GEMMA II, where the best result in the world on the value of the upper limit of the neutrino magnetic moment was obtained. The second direction is tied with the measurements by а solid scintillator detector DANSS (Detector of Anti-Neutrino based on Solid Scintillator) designed for remote on-line diagnostics of nuclear reactor parameters and search for short range neutrino oscillations. It is now installed at the Kalinin Nuclear Power Plant. DANSS is a 1m^3 plastic scintillator detector divided into 2500 cells and surrounded with combined passive and active shielding to suppress external radiation backgrounds. We demonstrate that the detector is capable to measure nuclear reactor thermal power with an accuracy of about 1.5% in one day. DANSS is placed on a movable platform. It can change the distance from the detector to the reactor core from 10.7 to 12.7 meters. Measurements of the neutrino flux and energy spectrum at different distances should allow to study a large fraction of a sterile neutrino parameter space indicated by recent experiments and reanalysis of the reactor neutrino fluxes. Experiment status will be presented together with some preliminary results based on about 170 days of active data taking during the first year of operation.
Speaker: Dr. Alexander Starostin (ITEP)
• 14:00
10 years of research with the Borexino experiment 30m
Speaker: Dr. Gioacchino Ranucci (INFN - Milano)
• 14:30
Neutrino oscillations - status and prospects of accelerator and reactor experiments 30m
Speakers: Prof. David Lee WARK (Oxford University/Rutherford Appleton Laboratory) , Prof. Yury Kudenko (INR RAS)
• 15:00 15:30
Coffee-break 30m
• 15:30 18:05
Facilities and Advanced Detector Technology - 1 Moskvorechye-1 hall

### Moskvorechye-1 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Vladimir Obraztsov (Institute for High Energy Physics - "NRC KI")
• 15:30
Upgrades of the CMS muon system in preparation of HL-LHC 20m
The present CMS muon system operates three different detector types: in the barrel - drift tubes (DT) and resistive plate chambers (RPC), in the endcap - cathode strip chambers (CSC) and another set of RPCs. In view of the operating conditions at HL-LHC, it is vital to assess the detector performance for high luminosity. New irradiation tests planned to ensure that the muon detectors survive the harsher conditions and operate reliably. The new CERN GIF++ (Gamma Irradiation Facility) allowed to perform aging tests of these large muon detectors. We present results in terms of system performance under large backgrounds and after accumulating charge through an accelerated test to simulate the expected dose. New detectors will be added to improve the performance in the critical forward region: large-area triple-foil gas electron multiplier (GEM) detectors will be installed in the pseudo-rapidity region 1.6 < $\eta$ < 2.4, aiming at suppressing the rate of background triggers while maintaining high trigger efficiency for low transverse momentum muons. For the HL-LHC operation the muon forward region should be further enhanced with another large area GEM based station, called GE2/1, and with two new generation RPC stations, called RE3/1 and RE4/1, having low resistivity electrodes. These detectors will combine tracking and triggering capabilities and can stand particle rates up to few kHz/cm2. In addition to take advantage of the pixel tracking coverage extension a new detector, ME0 station, behind the new forward calorimeter, covering up to |$\eta$| = 2.8.
Speaker: Victor Perelygin (JINR)
• 15:50
Status and commissioning of the new GEM-based subsystem GE1/1 of the CMS muon system 20m
The upgrades of the LHC planned in the next years yield an increase of the instantaneous luminosity up to 5x10^34 cm-2 s-1 after Long Shutdown 3; a value about five times higher than the nominal one for which the CMS experiment was designed. The resulting larger rate of interactions will produce a higher pileup environment that will challenge the trigger system in its original configuration, in particular in the endcap region. As part of the upgrade program of the CMS muon endcaps, additional muon detectors based on Gas Electron Multiplier (GEM) technology will be installed, in order to be able to sustain a physics program during high-luminosity operation without performance losses. The installation of the GE1/1 station is scheduled for Long Shutdown 2; already a demonstrator composed of five superchambers has been installed during the "Extended Year-End Technical Stop" at the beginning of this year. Its goal is to test the system’s operational conditions and also to demonstrate the integration of the GE1/1 chambers into the trigger. This contribution will present the status of the installation and commissioning of the GE1/1 demonstrator.
Speaker: Mrs. Martina Ressegotti (University and INFN Pavia)
• 16:10
Tests of scintillator tiles for the technological prototype of highly granular hadron calorimeter 15m
The CALICE collaboration is developing a new technological prototype of a highly granular hadron calorimeter for future collider experiments. The proposed baseline design of the active elements considers scintillator tiles with a silicon photomultiplier readout. The light yield and uniformity of response of new tiles from different producers were measured. The technology proposed for the ILD detector was used: the SiPm was coupled directly to the dimpled scintillator tile and each tile was individually wrapped in the reflecting foil. The experimental results are compared with simulations, which use the optical photon transport functionality available in the Geant4 package.
Speaker: Mr. Sergey Korpachev (MEPhI)
• 16:25
The PSD supermodule response study at proton beam energies 2-5 GeV at CERN test beams. 15m
The study of supermodule of the CBM Projectile Spectator Detector response at proton beam energy 2 – 5 GeV has been done at CERN T10 beam line at first half of September 2017. The PSD supermodule is an array of 3x3 modules and is assembled from 9 modules with transverse dimensions of 20x20 cm2 and longitudinal dimension of 5.6 interaction lengths. These modules are constructed at INR for the CBM experiment at FAIR. The module consists of 60 lead/scintillator layers with sampling ratio 4:1. Light from each scintillator plate is collected by WLS fiber. Scintillator light from 6 consecutive scintillator plates (section) is detected by 3x3 mm2 Hamamatsu MPPC. In total, 10 MPPCs are used to detect light from 10 longitudinal sections in each module. Preliminary results on the longitudinal profile of energy deposition, response linearity and energy resolution are presented in this talk.
Speaker: Mr. Nikolay Karpushkin (Institute for Nuclear Research of the Russian Academy of Sciences)
• 16:40
Upgraded Inner Tracking System for ALICE at the LHC: Status and Plans 25m
Upgraded Inner Tracking System for ALICE at the LHC: Status and Plans Grigory Feofilov (for the ALICE Collaboration) Saint-Petersburg State University ICPPA-2017 2-5 October 2017, MEPhI, Moscow ALICE has demonstrated its excellent capabilities in measurements of pp, p-Pb and Pb-Pb collisions at various energies during all years of the LHC operation. In view of new long-term physics goals that could be reached following upgrades in 2019-2020 shutdown, one of the most challenging tasks is to improve the ALICE performance for heavy-flavour detection. High precision measurements of secondary vertices of short-lived particles will be done in ALICE with the upgraded silicon Inner Tracking System (ITS). The studies of rare processes with charmed and beauty baryons production, accessible for the first time in heavy-ion collisions at the LHC, will bring new and unique information on the properties of the Quark-Gluon Plasma (QGP) and, in particular, on the process of QGP thermalization. The ITS upgrade requirements and performance achieved by its proposed design in terms of accuracy of secondary verticies determination, high standalone tracking efficiency at low pT and with increased readout rate capabilities were estimated previously by the ALICE collaboration at the time of Technical Design Report preparation. The goal of the present report is to present ITS finalized design, currently under construction, and to provide some highlights of the current activities now entering into the production phase. The near future plans will be also touched briefly.
Speaker: Dr. Grigory Feofilov (Saint-Petersburg State University)
• 17:05
Charge particle veto detector of the LHC ALICE experiment 15m
Charge Particle Veto detector of the ALICE experiment at LHC will be presented. We present physics motivation of the detector, its construction and operation in physics runs with the ALICE. We will describe readout electronics and conditions for data taking. Special attention will focus on CPV automation via detector control system. We will describe different states of the detector and protection algorithms implemented into the control system.
Speaker: Mr. Evgeny Kondratyuk (IHEP, Protvino)
• 17:20
Advanced Machine-Learning Solutions in LHCb Operations 15m
The LHCb detector is a forward spectrometer optimised for the reconstruction of decays of charm and bottom hadrons produced in LHC proton-proton collisions. The need to process large amounts of data efficiently within the constraints of the data acquisition and offline computing resources pushes steadily toward using advanced data analysis approaches. The machine-learning solutions developed by LHCb collaborators are used for an increasing class of essential online and offline tasks, including more precise and faster real-time classification and selection of interesting events, smarter detector-performance calibrations, and a more precise, efficient, and unbiased offline characterization of reconstructed events. In this talk, we overview recent original applications of machine-learning in the trigger, operations, and analysis of LHCb data in 2015-2016 and discuss ongoing and future developments.
Speakers: Denis Derkach (National Research University - Higher School of Economics) , Mr. Mikhail Hushchyn (NRE Higher School of Economics, Moscow, Russia)
• 17:35
Investigation of WLS techniques for the LAr-detector in the COHERENT experiment 15m
Liquid Argon (LAr) is a well-known scintillator widely used for different experiments. It is also used as a working medium in the detector CENNS-10 which is one of the detectors within the COHERENT experiment. Wavelength of LAr scintillation is very low (128 nm) and wavelength shifters (WLS) are required to collect the scintillation light. Investigations of different WLS types and technologies for the detector CENNS-10 will be presented.
Speaker: Mr. Dmitry Rudik (ITEP)
• 17:50
Digital systems by CAEN for multiparameter analysis in physical applications 15m
Компания CAEN является одним из безусловных лидеров рынка цифровой электроники и является единственной компанией в мире, предоставляющей полный спектр высоковольтных и низковольтных источников питания, а также различных модулей сбора данных, соответствующих всем стандартам IEEE. Компания CAEN предоставляет современное оборудование для экспериментов и исследований в областях: · Физики высоких энергий · Астрофизики · Нейтринной физики · Исследований тёмной материи · Ядерной физики · Наук о материалах · Медицинской физики · Национальной безопасности · Производства CAEN каждый год улучшает свое оборудование в техническом плане и добавляет совершенно новый функционал, позволяющий уменьшать количество используемой электроники и расширять области ее применения. В рамках данного доклада будут рассмотрены новые классы электронных цифровых систем, представленных CAEN за последнее время. Безусловным драйвером последних лет являются многоканальные источники питания, позволяющие в рамках одной системы собирать и программировать весь необходимый функционал для питания детекторов. В то же время, системы сбора данных класса «digitazers», которые, являясь интеллектуальными многоканальными АЦП, позволяют качественно уменьшить шумность измеряемого сигнала по сравнению с традиционной электроникой, в том числе обеспечить гибкость настройки, обработки и масштабирования результатов.
Speaker: Mr. Ivan Bredikhin (GammaTECH)
• 15:30 17:30
Neutrino and Astroparticle Physics - 3 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Dr. Dmitry Akimov (ITEP and MEPhI)
• 15:30
Status of COHERENT:CsI[Na] experiment at SNS 15m
The COHERENT collaboration aims to observe coherent elastic neutrino nuclear scattering (CEvNS) using several detector options including Ge, Ar, NaI and CsI[Na]. The latter has completed the first year of operation at the Spallation Neutron Source located at the Oak Ridge National Laboratory. The description and status of the CsI[Na] detector will be presented.
Speaker: Alexey Konovalov (MEPhI/ITEP)
• 15:45
Heavy neutrinos effects for oscillation of light neutrinos at short distances 15m
The transition and survival probabilities for the different light neutrinos are calculated with account of contributions of heavy neutrinos. The graphical dependences are obtained for the disappearance probability of muon neutrino/antineutrino and appearance probability of electron neutrino/antineutrino in the muon neutrino/antineutrino flux as functions of distance and other model parameters and at different neutrino energies, as well as functions of the ratio of the distance to the neutrino energy. It is shown that in the case of the mixing matrix of a definite type between light and heavy neutrinos the explanation of the neutrino anomalies at short distances is possible. A new parameterization and a certain form of the mixing matrix for light and heavy neutrinos are used with account of the possible violation of CP invariance. The theoretical results obtained can be applied for the interpretation and prediction of results of the ground-based experiments on searching for heavy neutrinos, and also for the analysis of certain astrophysical data.
Speaker: Dr. Viacheslav Khruschov (National Research Centre Kurchatov Institute, Moscow; Center for Gravitation and Fundamental Metrology VNIIMS, Moscow)
• 16:00
Search for physics beyond the Standard Model at KamLAND 15m
The talk covers two topics: neutrinoless double-beta decay search using $^{136}$Xe at KamLAND-Zen, and direct Dark Matter search using ultra-radio-pure NaI(Tl) detectors at KamLAND underground facilities. The KamLAND-Zen is currently the largest neutrinoless double beta decay experiment which holds world's best limit on $T_{1/2}^{0\nu} > 1.07 \times 10^{26}$ yr at 90% C.L.. This limit corresponds to the effective neutrino mass range of 61-165meV depending on choice of nuclear matrix elements. Overview, current status and future prospects for both experiments will be discussed in details.
Speaker: Alexandre Kozlov (Tokyo uinversity)
• 16:15
Present and future of double beta decay experiments 15m
The investigation of neutrinoless double beta decay (0vββ), violating lepton number, is the only practically viable experimental approach to discriminate between Majorana and Dirac character of neutrinos. The observation of neutrinoless double beta decay would also provide a value of its effective mass [m ββ], and possibly in the future, open the window to study CP violation in the lepton sector induced by Majorana phases. The exchange of a light Majorana neutrino is the most standard interpretation of (0vββ). In spite of that, other more exotic mechanisms are possible beyond the Standard Model, such as heavy neutrinos, non-standard Higgs, SUSY mechanisms and many others for which investigation of (0vββ) can provide very competitive limits. Several tens of experiments using different isotopes and variety of techniques are searching for this very rare process. Five experiments (GERDA, EXO, KamLAND-Zen, CUORE, NEMO) already reached [m ββ] < 1 eV sensitivity with four different isotopes. Upgraded and new experiments coming to investigate the inverted neutrino mass hierarchy region of [m ββ] < 10 -50 meV. The achieved results, present status of the ongoing experiments as well as expected sensitivities and discovery potentials of the different proposals are reviewed.
Speaker: Prof. Anatoly Smolnikov (MPIK (Heidelberg) / JINR(Dubna))
• 16:30
New data release of GERDA Phase II: search for 0νββ decay of 76Ge 15m
The GERmanium Detector Array (GERDA) experiment at the INFN Gran Sasso Laboratory, Italy, is searching for the neutrinoless double beta (0νββ) decay of the isotope $^{76}$Ge. High-purity germanium crystals enriched in $^{76}$Ge, simultaneously used as source and detector, are directly deployed into ultra-pure cryogenic liquid argon, which acts both as cooling medium and shield against the external radiation. The signature of the 0νββ decay would be a mono-energetic peak at the Q$_{\beta\beta}$-value of the process, namely 2039 keV for $^{76}$Ge. Data from the first phase of GERDA (Phase I), collected between 2011 and 2013, gave no positive indication of the 0νββ decay of $^{76}$Ge with an exposure of about 20 kg$\cdot$yr and a background index at the Q$_{\beta\beta}$-value of 10$^{−2}$ counts/(keV$\cdot$kg$\cdot$yr). A lower limit on the half-life of the process of T$_{1/2} > 2.1\cdot10^{25}$ yr (90$\%$ C.L.) was set. The second phase of the experiment is taking data since end of 2015: newly developed custom-made BEGe-type Germanium detectors add 20 kg of mass and allow for a superior background rejection by pulse shape discrimination while the instrumentation of the cryogenic liquid surrounding the detectors acts as additional active veto and assures a further background suppression. Initial results from Phase II with about 10 kg$\cdot$yr exposure (published in Nature vol. 544, April 6th 2017) allow to improve the limit on the half-life of 0νββ decay of $^{76}$Ge to T$_{1/2} > 5.3\cdot10^{25}$ yr (90$\%$ C.L.) and indicate that the target background of 10$^{−3}$ counts/(keV$\cdot$kg$\cdot$yr) is achieved, thus making GERDA the first experiment in the field which will be “background free” up to the design exposure of 100 kg$\cdot$yr. At present, while the data taking is in progress, a valid exposure of 34 kg$\cdot$yr has been accumulated taking into account the runs until April 15th 2017. In this talk I will summarize the basic concept of the GERDA design, the data taking and the physics results obtained in Phase II. A special focus will be given to the background achieved at Q$_{\beta\beta}$ and to the analysis of the residual background components. I will then show the results of the data unblinding of June 2017 and the expected performances for the full 100 kg$\cdot$yr exposure.
Speaker: Dr. Natalia Di Marco (LNGS-INFN)
• 16:45
From EXO-200 to nEXO 15m
Setup description and the latest results for EXO-200 experiment are presented. Detector is liquid xenon TPC dedicated to study of 136Xe double beta decay. It contains ~150 kg of xenon and is located in underground low-background laboratory. Careful material selection and cleaning procedures along with complicated analysis resulted in one of the lowest Background Index among low-background detectors. Experiment made the first observation of the 2b2n decay in 136Xe and the most precise measurement of half-life among any double beta decay to date. Also it has provided one of the most sensitive searches for the neutrinoless double beta decay using the first two years of data. The detector had recovered after incident in the mine and had undertaken a pending upgrade and starting Mar'2016 collects new physics data. This talk will cover the latest results of the collaboration including new data with improved analysis. In order to reach neutrino mass level of inverse hierarchy, the nEXO collaboration is developing a low-background detector with 5 tonnes of liquid xenon enriched in the isotope Xe-136. The detector design is based on the success of the EXO-200 detector. The current results of the development of the nEXO baseline concept will be presented.
Speaker: Mr. Vladimir Belov (ITEP and MEPhI)
• 17:00
Geoneutrinos and Earth heat flux 15m
Non direct observations demonstrate that Earth heat flux could be sufficiently larger than one measured by using of the temperature gradient method. Analysis of heat transfer channels also ensures that heat flux could be higher. At the moment data on 238U and 232Th antineutrino fluxes from KamLAND and Borexino measurements do not contradict the BSE model. Accurate measurement of all geoneutrino fluxes, including 40K antineutrino one, can clarify the situation.
Speaker: Mr. Valery Sinev (INR RAS)
• 17:15
Latest results of the Double Chooz reactor neutrino experiment 15m
The Double Chooz experiment (DC) is a reactor neutrino oscillation experiment running at Chooz nuclear power plant (2 reactors) in France. In 2011, DC first reported indication of non-zero θ13 mixing angle with the far detector (FD) located at the maximum of oscillation effects (i.e. disappearance), thus challenging the CHOOZ non-observation limit. A robust observation of θ13 followed in 2012 by the Daya Bay experiments with multiple detector configurations. Since 2015 DC runs in a multi-detector configuration strongly reducing the impact of several otherwise dominating systematics. DCs unique almost “iso-flux” site, allows the near detector (ND) to become a direct accurate non-oscillation reference to the FD. Our first multi-detector results, presented at MORIOND-2016 based on the neutron capture on Gadolinium, were dominated by the statistical error. The combined observation of neutron capture on Gadolinium and Hydrogen allowed us to overcome this issue and reduce the statistical error by about 40%. In this talk the new results will be presented, showing that we are today dominated by the detection systematic and that a final sensitivity on sin2(2θ13) of better than 0.01 is within reach.
Speaker: Dr. Emmanuel Chauveau (CENBG, IN2P3, CNRS)
• 15:30 17:30
Nuclear Physics - 2 Moskvorechye-2 hall

### Moskvorechye-2 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Dr. Boris Chernyshev (National Research Nuclear University MEPhI)
• 15:30
Nucleosynthesis of Heavy Elements in Thermonuclear Explosions 15m
Nucleosynthesis of Heavy Elements in Thermonuclear Explosions Yu. S. Lutostansky1, V. I. Lyashuk2,1 1National Research Center "Kurchatov Institute", Moscow, 123182 Russia 2 Institute for Nuclear Research, Russian Academy of Science, Moscow, 117312 Russia E-mail: Lutostansky@yandex.ru The process of heavy elements production under the intensive pulsed neutron fluxes with a density of up to 1025 neutrons/cm2 is considered. The nature of neutron impulses can be both astrophysical and artificial origin. In astrophysical conditions, the formation of heavy nuclei occur at multiple neutron capturing process in rapid r-process [1], for example, at supernova explosions. In terrestrial conditions such processes are take places in nuclear/thermonuclear explosions [2]. The explosive process of artificial origin are differed from astrophysical ones by small duration time (t < 10-6 s), that allows to split it into two phases: the neutron capturing process and the following β-decays of N-rich nuclei [3]. Such a process can be called “prompt rapid” or pr-process and solution of the equations for calculating the concentration NA,Z(t) of formed nuclei is greatly simplified. Using the previously developed mathematical kinetic model describing the formation of heavy elements in the pulsed nucleosynthesis [4], adapted to the description of nuclear explosions - the adiabatic binary model (ABM) [5], it became able to calculate the concentrations of transuranium nuclei produced in thermonuclear explosions made in the USA (“Mike”, “Par”, “Barbel”). The results of our calculations using ABM are compared with the experimental date in all mass number region A = 239 – 257. As a result our standard rms deviation for “Mike” experiment is δE(ABM) = 91% is better than the first calculations of Dorn [6] with δE([6]) > 400%, or recent calculations [7] with δE([7]) = 180 %. For “Par” experiment we had obtained δE(ABM) = 33% and for Dorn and Hoff [8] δE([8]) = 76 %. For “Barbel” experiment δE(ABM) = 33% and compare to Bell [2] δE([2]) = 54%. So it is possible to conclude that the authors ABM-model [5] allows to obtain better results in simulations of transuranium isotopes under conditions of nuclear explosions. The calculations include the processes of delayed fission (DF) and the emission of delayed neutrons (DN), which determine the "losing factor" – the total loss of isotope concentration in the isobaric chains. The DF and DN probabilities were calculated in the microscopic theory of finite Fermi systems. Thus, it was possible to describe the even-odd anomaly in the distribution of concentrations N(A) in the mass number region A = 251 – 257. It is shown qualitatively also that the odd-even anomaly may be explained mainly by DF of very neutron-rich uranium isotopes. The work is supported by the Russian RFBR grant 16-02-00228 and RSF project 16-12-10161. 1. B. M. Burbridge, G. Burbridge, W. Fowler, P. Hoyle. Rev. Mod. Phys. 29, 547 (1957). 2. G. I. Bell. Phys. Rev. B 139, 1207 (1965). 3. Yu. S. Lutostansky, V. I. Lyashuk, I. V. Panov. Bull. Russ. Acad. Sci. Phys. 74, 504 (2010). 4. Yu. S. Lyutostanskii, et al. Yad. Fiz. 42, 215 (1985) [Sov. J.Nucl. Phys. 42, 136 (1985)]. 5. Yu. S. Lutostansky, V. I. Lyashuk, I. V. Panov. Bull. Russ. Acad. Sci. Phys. 75, 533 (2011). 6. D. W. Dorn. Phys. Rev. 126, 693 (1962). 7. V. I. Zagrebaev, A. V. Karpov, I. N. Mishustin, and W. Greiner. Phys. Rev. C 84, 044617 (2011). 8. D. W. Dorn and R. W. Hoff. Phys. Rev. Lett., 14, 440 (1965).
Speaker: Prof. Yuri Lutostansky (Kurchatov Institute)
• 15:45
Possible existence of neutron-proton halo in 6Li 15m
Speaker: Dr. Alla Demyanova (NRC Kurchatov Institute, 1, Akademika Kurchatova pl., Moscow, 123182, Russia)
• 16:00
Charged particle evaporation in the stopped pion absorption reactions. 15m
The results of the investigation on spectra and yields of hydrogen isotopes formed in the reaction of the stopped pion absorption by atomic nuclei are presented. The study is based on the unique data on charged particle formation following pion absorption on 17 target nuclei in the mass range 6 < A < 209. The experiment was conducted on the PNPI synchrocyclotron using the semiconductor spectrometer. In our previous works we proposed a model that allowed us to satisfactorily reproduce spectra of the charged particles (p, d, t) formed in the pion absorption on medium and heavy nuclei. In addition we managed to reproduce primary and pre-equilibrium parts of yields. In the present work we deeply analyze evaporative spectra and yields of p,d,t formed in the reaction. It is shown that the equilibrium temperature values obtained through the usage of our model are in agreement with the values obtained in various experiments. We also discuss the behaviour of A-dependances of evaporative yields and consider possible contributions of the indirect evaporation process.
Speaker: Mr. Roman Pritula (MEPhI)
• 16:15
THE IMPACT OF THE TENSOR INTERACTION ON THE β-DELAYED NEUTRON EMISSION OF THE NEUTRON-RICH NI ISOTOPES 15m
The neutron emission of the $\beta$-decay of $^{74,76,78,80}$Ni are studied with the Skyrme interaction taking into account the tensor terms. Calculations are performed within the quasiparticle random phase approximation. The coupling between one- and two-phonon terms in the wave functions of the low-energy $1^{+}$ states of the daughter nuclei is taken into account. It is shown that the strength decrease of the neutron-proton tensor interaction leads to the substantial increase of the half-life and the neutron-emission probability.
Speaker: Mr. Evgenii Sushenok (BLTP, JINR)
• 16:30
Search for periodical variations of Fe-55 nucleus weak decay parameters 15m
Possible temporal variations of nucleus decay parameters studied extensively in the last years, their observation can be the signal of unknown physical effects. Earlier, several experiments reported the annual and daily decay rate oscillations in alpha and beta-decays of some nuclides of the order .05 %. Our experiment studies the decay rate variations in inverse beta-decay (e-capture) of Fe-55 isotope. In this process K-shell electron absorbed by nuclei and electron neutrino emitted; it accompanied by X-ray with energy 5,9 or 6,4 KeV which in our set-up detected by cooled Si-Pin detectors. Together with observed Fe-55 decay exponent with life-time 1004 days, daily oscillation component value is found at the level (.21 +/- .04)%. Another period 29.5 +/- 1.5 days corresponding to moon month is found with amplitude (.32 +/- .4)% is also observed. Analogous Fe-55 decay measurements by Si-Pin detectors in orbital flight conditions are planned at International Space Station as part of DODO project.
Speaker: Prof. Sergey Mayburov (Lebedev Institute of physics)
• 18:30 21:00
Conference dinner 2h 30m
• Thursday, 5 October
• 09:00 12:15
Excursion to Tsaritsino 3h 15m
• 10:25 12:15
Heavy Ion Physics - 3: Additional Session Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Dr. Dmitri Peresunko (Kurchatov Institute)
• 10:25
Study of heavy-ion and proton interactions with nuclei on the LHC beams with fixed target 20m
Using the multi-TeV LHC proton and lead beams in a fixed target experiment (Project AFTER) has an advantage for investigation of rare processes of particle production and polarization phenomena. Within the framework of the project it is planned to determine the parameters necessary for the analysis of cosmic rays and neutrino astrophysics, a detailed study of processes of quarkonia production, the investigation of the quark and gluon structure of hadrons and the search for new physics in the phase transition of nuclear matter to quark-gluon plasma. The halo of the high intensity beams of protons and lead ions accumulated in the LHC collider could be used by placing into it a solid or gaseous fixed target or a bent crystal for beam extraction. A polarized target could be installed in the extracted beam. The particle energy reaches values only half as much as at the RHIC collider, but the luminosity exceeds the luminosity of the collider. For a proton beam with an energy of 7 TeV√(s_NN )= 114.6 GeV, and for lead ions with an energy of 2.76 TeV per nucleon √(s_NN ) = 71.8 GeV. Since only the halo of the beam is used, the functioning of the main LHC installations is not violated. By using LHC beams with reduced energy on a fixed target, the data will be obtained in the energy range 30-100 GeV, which could be more promising than at ultrahigh energies for the search of the phase transition effects and the determination of the critical point.
Speaker: Dr. Nataliya Topilskaya (Institute for Nuclear Research RAS)
• 10:45
Performance of hadron calorimeter (Projectile Spectator Detector – PSD) at NA61/SHINE experiment 20m
The fixed target experiment NA61/SHINE at CERN SPS is aimed to study the onset of deconfinement and searching for the critical point of strongly interacting matter. A segmented hadron calorimeter - the Projectile Spectator Detector (PSD) - is used in NA61 experiment to determine a collision centrality and to reconstruct an event plane orientation in collisions of nuclei. The PSD gives a precise characterization of the event class for the analysis as well as centrality selection on trigger level. Wide ranges of beam energies and size of the system require high dynamic range of read-out electronics. Meanwhile sensitivity to low signals is needed for the PSD calibration based on minimum ionizing energy losses. The PSD is also used as particle identification detector to distinguish electrons and positrons from pions in data taking for Fermilab neutrino beam lines in 2017. PSD hardon calorimeter performance will be discussed as well as linearity of response and energy resolution will be presented. Data taking at extremely high energies (up to 150 AGeV) with heavy ions (Pb) will be shown.
Speaker: Mr. Sergey Morozov (INR/MEPhI)
• 11:05
Study of clusters and hypernuclei formation within PHQMD+FRIGA model at the NICA energies 20m
We report on the results on the dynamical modelling of cluster formation with the new combined PHQMD+FRIGA model at Nuclotron and NICA energies. The FRIGA clusterisation algorithm, which can be applied to the transport models, is based on the simulated annealing technique to obtain the most bound configuration of fragments and nucleons. The PHQMD+FRIGA model is able to predict isotope yields as well as hyper-nucleus production. Based on present predictions of the combined model we study the possibility to detect such clusters and hypernuclei in the BM@N and MPD/NICA detectors.
Speaker: Mr. Viktar Kireyeu (JINR)
• 11:25
Integrated simulation of fragmentation, evaporation, and gamma-decay processes in the interaction of cosmic-ray heavy ions with the atmosphere using PHITS 20m
The Cosmic ray heavy ions interacting with the nuclei in the atmosphere produce various secondary particles such as nucleons, nuclear clusters, fragments, mesons, and prompt gamma-rays. Some of the recent experiments focus on the coincidence measurement of the prompt gamma-rays emitted in the interaction of heavy ions and atmosphere. A number of simulation codes have been developed for prediction of cosmic ray reactions. However, very few can simulate event-by-event prompt gamma-ray emission because it is necessary to determine the isotopic species produced in each reaction and to calculate the internal transition intensity between discrete levels based on the nuclear structure data. The excitation energy of heavy ion fragments is predominantly emitted as prompt gamma-rays. Therefore the gamma-rays from energetic projectile fragments are Lorentz-boosted and observed as energetic gamma-rays in the laboratory frame. Because the Lorentz gamma-factor of each fragment can be large, the gamma-rays reach GeV range. In order to consistently calculate the fragmentation reactions leading to gamma-ray emission, reactions models were revised and implemented to the general-purpose radiation transport code PHITS. In this work, the non-equilibrium phase of the projectile-target nuclear reaction, the equilibrium decay phase, and the gamma de-excitation phase are simulated by the Jaeri Quantum Molecular Dynamics model (JQMD), the generalized evaporation model (GEM), and ENSDF-Based Isomeric Transition/isomEr production Model (EBITEM), respectively. Recently, JQMD was revised to precisely calculate peripheral collisions in addition to central collisions. EBITEM is a gamma-decay reaction model, which uses the nuclear structure data taken from ENSDF and the angular momenta of the residual nuclei after the statistical decay. Because all these models are event generators, secondary particle emission was calculated in event-by-event basis. The produced secondary particles were Lorentz-transformed to the laboratory frame. Prompt gamma-ray emission was simulated in typical conditions such as 10 AGeV Oxygen interactions with Nitrogen. The calculated gamma-ray energy spectra showed sharp peaks corresponding to particular internal transition paths. This study shows that the combination of JQMD+GEM+EBITEM, particularly de-excitation simulation based on the nuclear structure data, is useful for event-by-event calculation of prompt gamma-rays emitted in the interaction of cosmic ray heavy ions and the atmosphere.
Speaker: Dr. Tatsuhiko Ogawa (Research Group for Radiation Transport Analysis, Division of Environment and Radiation Sciences, Nuclear Science and Engineering Center, Japan Atomic Energy Agency)
• 11:45
Track reconstruction and GEM detector performance in BM@N experiment. 15m
BM@N experiment tracking system consist of Multiwire Proportional chambers, Gas Electron Multiplier (GEM) and Drift Chambers. It is used for trajectories reconstruction of charged particles. GEM detector is located inside the magnet and plays crucial role in track reconstruction. Algorithm of track reconstruction is described. GEM detector performance (efficiency and spatial resolution) is presented.
Speaker: Ms. Vasilisa Lenivenko (JINR)
• 12:00
TEST OF NUCLEAR FRAGMENTATION MODELS WITH CARBON FRAGMENTATION AT 0.95 GeV/n 15m
Differential cross sections of nuclear fragment production at 3.5 degrees for 12C fragmentation at 0.95 GeV/nucleon on a Be target were measured with beam-line spectrometer in the FRAGM experiment at the TWA–ITEP heavy ion accelerator [1]. The fragments from proton to carbon isotopes have been identified by correlation measurement of time-of-flight and ionization losses in scintillation detectors. The fragment momentum distributions in laboratory frame are compared to the predictions of four ion-ion interaction models: INCL++, LAQGSM03.03, QMD and BC [2]. Obtained experimental data on differential cross sections for wide set of fragments are included to the experimental nuclear reaction database EXFOR[3]. Successes and drawbacks of above mentioned models are discussed. Two approaches were used to describe the invariant cross sections of the fragment production. In the thermodynamic model [4], the spectra for protons and light fragments can be described as a sum of two exponential functions with different inverse slope parameters (called temperatures) for statistic and cumulative mechanisms. Obtained temperatures are in a good agreement with world data. For light fragments, coalescence model have been used to extract information on a size of the interaction region [5]. The measurements of coalescence coefficients give the typical radius about 3 fm. References 1. B.M. Abramov et al., JETP Lett. 97 (2013) 439, Pisma Zh.Eksp.Teor.Fiz. 97 (2013) 509. 2. B.M. Abramov et al., Phys.Atom.Nucl. Vol. 78, Issue 5 (2015), 403. 3. B.M. Abramov et al., Phys.Atom.Nucl. Vol. 79, Issue 5 (2016), 700. 4. W. Bauer, Phys.Rev. C 51 (1995), 803. 5. S. Nagamiya et al., Phys.Rev. C 23 (1981), 971.
Speakers: Mr. M Martemianov (ITEP) , Dr. V Kulikov (NRC Kurchatov Institute - ITEP)
• 12:15 13:30
Lunch 1h 15m
• 13:30 15:40
Plenary - 7 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Alexander vasiliev (NRC "Kurchatov Institute" - IHEP)
• 13:30
Recent results of Standard Model and Higgs studies from ATLAS and CMS experiments 35m
Speaker: Dr. Daniel Froidevaux (CERN)
• 14:05
Search for physics beyond SM at ATLAS and CMS 35m
Speaker: Lesya Shchutska (ETH Zürich)
• 14:40
Recent results of the the IHEP 30m
Speaker: Prof. Alexandre Zaitsev (NRC KI - IHEP)
• 15:10
Status and prospects of development of the Protvino accelerator complex 30m
• 15:40 16:10
Coffee-break 30m
• 16:10 18:10
Facilities and advanced detector technology - 2 Moskvorechye-2 hall

### Moskvorechye-2 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Prof. Vasilii Mochalov (IHEP, Protvino, Russia)
• 16:10
Status of UCN source at WWR-M reactor 15m
The WWR-M reactor at PNPI is going to be equipped with an ultacold neutron source of high density. Method of UCN production is based on their accumulation in the super fluid helium due to particular qualities of that quantum liquid. The possibility of maintaining the temperature T = 1.371K with a thermal load of P = 60W was shown experimentally, while the theoretical load is expected to be P=30W. The project envisages the development of experimental stations on UCN beams such as searching for the nEDM, measure the neutron lifetime, and the observation of neutron to antineutron oscillation. In addition of three beams of cold and verycold neutrons are planned. Six experimental setups will be installed on these beams. At present, a vacuum container of the UCN source has been manufactured and the manufacture of low-temperature deuterium and helium parts of the source has been started.
Speaker: Mr. Vitaliy Lyamkin (PNPI NRC KI)
• 16:25
The BM@N experiment at JINR: status and physics program 15m
BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the accelerator complex of NICA-Nuclotron at JINR (Dubna, Russia). The aim of the experiment is to study interactions of relativistic heavy ion beams with energy up to 5.5 AGeV with fixed targets. The research program of the experiment includes studies of strange mesons, multi-strange hyperons and light hyper-nuclei which are produced in nucleus-nucleus collisions close to the kinematic threshold. The BM@N set-up, the experimental program and first results of technical runs are presented.
Speaker: Mr. Gleb Pokatashkin (VB LHEP JINR)
• 16:40
Light output distribution in scintillator strips with wave length shifting fibers of DANSS spectrometer 15m
Nikita Pogorelov for the DANSS collaboration DANSS is a highly segmented plastic scintillator detector, which use scintillator strips with a Gd-loaded reflective cover to detect reactor antineutrino using inverse beta-decay. Light is collected with wave length shifting fibers (3 per strip) placed in grooves. Therefore it could be significantly nonuniform distribution of light output. Transversal profile of light output was studied in ITEP at the test bench consisting of proportional chambers and scintillator strips. Tracks of cosmic particles, which crossed chambers, were reconstructed with high accuracy, whereby transversal profiles of light output were built with step 1 mm for six scintillator strips. This result is important for calibration of DANSS and method could be useful in constructing similar detectors.
Speaker: Mr. Nikita Pogorelov (ITEP)
• 16:55
Si-detector based beta-spectrometer 15m
We present the layout and specifications of the beta-spectrometer based on two silicon detectors: the thick full-absorption detector (SiLi) and the thin transmission detector (Si). The described technique involves both detectors operating in a coincidence circuit. The described setup provides the effective separation of the electron spectrum from the collateral x-rays and gammas of a given nuclide. The spectrometer is designed for the task of high precision shape measurements of various beta-spectra. In particular, it was used to study the shape of 144Pr beta-spectrum, which is considered to be the most promising antineutrino source for the search of sterile neutrino oscillations.
Speaker: Mr. Evgeniy Unzhakov (Petersburg Nuclear Physics Institute)
• 17:10
A POSSIBILITY OF NEUTRON REGISTRATION IN BROAD ENERGY RANGE USING HYBRID SOLID STATE GAS DETECTOR BASED ON 10B LAYER 15m
A two-dimensional hybrid solid state gas detector [1] is used for neutron registration in fluxes enriched by fast or thermal neutrons. Computer simulation of amplitude distribution of detector pulses indicates a possibility to registrate thermal as well as fast (1-10 MeV) neutrons. As a result of simulation amplitude spectra corresponding to different neutron input energies and for different active gas layers of the detector are obtained. The operation of the detector was studied using W-Be photoneutron source at the Institute for Nuclear Research in fluxes with variable ratio of fast and thermal neutrons. Measured amplitude spectra and amplitude correlations for different neutron energies are compared with simulation results. A good agreement between experimental and simulated spectra indicates a possibility of using this detector to detect neutrons in broad energy region. In particular, the detector should be used for determining the conditions of obtaining optimal ratio of fast and thermal neutrons needed in various experiments. 1. S Potashev, Yu Burmistrov, A Drachev, S Karaevsky, E Konobeevski and S Zuyev. IOP Conf. Series: Journal of Physics: Conf. Series 798 (2017) 012160.
Speaker: Dr. Stanislav Potashev (Institute for Nuclear Research of the Russian Academy of Sciences)
• 17:25
Active Muon Shield for the SHiP Experiment at CERN 15m
The SHiP experiment is designed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. An essential task for the experiment is to keep the Standard Model background level low. In the beam dump, around 10^11 muons will be produced per second. The muon rate in the spectrometer has to be reduced by at least four orders of magnitude to avoid muon-induced combinatorial background. It is proved that novel active muon shield may be used to magnetically deflect the muons out of the acceptance of the spectrometer. The presentation will describe the idea of active shield, and recent results for its optimization using modern computing science approaches.
Speaker: Mr. Artem Filatov (Higher School of Economics, Yandex School of Data Analysis)
• 17:40
Test beam studies of possibilities to separate particles with gamma factors more than $10^3$ with of straw based Transition Radiation Detector. 15m
Measurements of hadron production in TeV energy range is one of the tasks of future studies at Large Hadron Collider (LHC). This addresses a study of the fundamental QCD processes at this energy range which are very important not only for a probing of the Standard Model but also extremely important for the physics of ultrahigh-energy cosmic particles. Such measurements would remove uncertainties in physics models explaining a production of particles with energies up to $10^{17}$ eV in the Universe (problem of a change of cosmic ray spectrum behaviour at this energies). For such kind of measurements a hadron identification is a key element of a future experiment. The only detector technology which has a potential ability to separate hadrons in this energy range is Transition Radiation Detector (TRD) technology. A prototype of the TRD based on straw proportional chambers with specially assembled radiator has been tested at the CERN SPS accelerator beam. Test beam results and their comparison with the detailed Monte Carlo simulations are presented.
Speaker: Dr. Vladimir Tikhomirov (P.N.Lebedev Physical Institute, Russian Academy of Sciences)
• 17:55
Measurements of angular distribution and spectrum of transition radiation with a GridPix detector 15m
In recent years, developments of gaseous detectors based on a combination of electron multiplication gap in the gas and pixel readout chips as a part of the anode plane (GasPixel detectors) reached a level where they can offer unique opportunities for particle detection. Transition radiation (TR) detectors based on this technology can be one of the possible applications. In this work, measurements of energy spectra and angular distributions of transition radiation photons produced by particles with different gamma factors made with a GridPix detector prototype are presented. The observed results are compared with theoretical predictions.
Speaker: Yury Smirnov (NRNU MEPhI)
• 16:10 18:10
Heavy Ion Physics - 4 Petrovsky hall

### Petrovsky hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Mr. Grigory Nigmatkulov (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
• 16:10
Fluctuation Phenomena in Dense quark Matter 20m
We investigate quark matter in the pre-critical fluctuation region of the QCD phase diagram.The soft collective mode of the quark pair field is derived using the time-dependent Ginzburg-Landau functional with random Langevin forces.We calculate the electrical conductivity, sound absorption and bulk viscosity at nonzero density and moderate temperature.This regime will be realized in future experiments at NICA and FAIR.
Speaker: Prof. Boris Kerbikov (ITEP, Lebedev, MIPT)
• 16:30
Evidence for the QCD tricritical endpoint existence at NICA-FAIR energies 20m
I would like to present several remarkable irregularities at chemical freeze-out which are found using an advanced version of the hadron resonance gas model. The most prominent of them are the sharp peaks of the trace anomaly and baryonic charge density existing at chemical freeze-out at the center-of-mass energies 4.9 GeV and 9.2 GeV. They are accompanied by two sets of highly correlated quasi-plateaus in the collision energy dependence of the entropy per baryon, total pion number per baryon, and thermal pion number per baryon which are found at the center-of-mass energies 3.8–4.9 GeV and 7.6–9.2 GeV. The low-energy set of quasi-plateaus was predicted a long time ago. On the basis of the generalized shock-adiabat model I show that the low-energy correlated quasi-plateaus give evidence for the anomalous thermodynamic properties inside the mixed phase found at the center-of-mass energies 4.3–4.9 GeV. In addition I would like to discuss the thermostatic properties of the mixed phase and the ones of an exponential mass spectrum of hadrons and to present the practical conclusions for the chemical equilibration of strangeness in heavy ion collisions. Using the similarity of low- and high-energy irregularities I argue that the high-energy correlated quasi-plateaus may correspond to a second phase transition. Its possible origin and a possible location of the tricritical endpoint of QCD matter phase diagram are also discussed.
Speaker: Prof. Kyrill Bugaev (Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine)
• 16:50
Quark Gluon plasma equation of state with the effect of chemical potential 20m
We work on the quark gluon plasma equation of state (EoS) using a simple phenomenological model. In this model, a quark mass depends on both temperature as well as quark chemical potential. We compute EoS such as pressure, energy density, entropy and speed of sound with the effect of quark chemical potential. The model results provide QGP EoS. Therefore new outcomes are in excellent agreement with other theoretical as well as experimental work.
Speaker: Dr. Yogesh Kumar (University of Delhi)
• 17:10
Performance of the MPD experiment for the azimuthal flow measurement 20m
The main goal of the future MPD experiment at NICA is to explore the QCD phase diagram in the region of highly compressed and hot baryonic matter in the energy range corresponding to the highest chemical potential. Properties of such dense matter can be studied using azimuthal anisotropy that are categorized by the Fourier coefficients of the azimuthal distribution decomposition. Performance of the detector response given from the simulated data via realistic reconstruction procedure will be discussed in this talk. Namely, centrality determination, reaction plane estimation, directed and elliptic flow coefficients will be shown.
Speaker: Mr. Peter Parfenov (NRNU MEPhI)
• 17:30
N-N, PT-N and PT-PT fluctuations in nucleus-nucleus collisions at the NA61/SHINE experiment. 20m
The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. For these goals a scan of the two dimensional phase diagram (T-μB) is being performed at the SPS by measurements of hadron production in proton-nucleus and nucleus-nucleus interactions as a function of collision energy and system size. In this contribution preliminary results on pseudorapidity dependences of transverse momentum and multiplicity fluctuations expressed in terms of strongly intensive quantities from the Be+Be and Ar+Sc energy scan will be presented. It will be shown how non-trivial effects evolve from the poissonian-like fluctuations for small pseudorapidity intervals with expansion of the analyzed acceptance. These fluctuations are supposed to be sensitive to the existence of the critical point. The results will be compared to the predictions of the EPOS model.
Speaker: Evgeny Andronov (Saint Petersburg State University)
• 17:50
Rapid change of multiplicity fluctuations in system size dependence at SPS energies 20m
Recent results on multiplicity fluctuations in p+p, Be+Be and Ar+Sc collisions from the NA61/SHINE collaboration will be presented. The scaled variance of charged hadron multiplicity changes little when going from p+p to Be+Be collisions and drops dramatically from Be+Be to Ar+Sc. The centrality selection procedure and the influence of volume fluctuations will be discussed. Comparison with the EPOS MC generator will be shown.
Speaker: Mr. Andrey Seryakov (SPSU)
• 16:10 18:05
High Energy Physics - 3 Moskvorechye-1 hall

### Moskvorechye-1 hall

#### Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Convener: Mr. Sergei Smirnov (NRNU MEPhI)
• 16:10
SM Higgs measurements at ATLAS 25m
The data collected by ATLAS in 2015 and 2016 have been analyzed to study the properties of the Higgs boson. Improved measurements have been derived using several decay channels and dedicated categories sensitive to different production modes and kinematic properties of the Higgs boson.
Speaker: Laurelle Maria Veloce (University of Toronto)
• 16:35
Dark matter searches with the ATLAS detector 25m
The presence of a non-baryonic dark matter component in the Universe is inferred from the observation of its gravitational interaction. If dark matter interacts weakly with the Standard Model it would be produced at the LHC, escaping the detector and leaving a large missing transverse momentum as its signature. The ATLAS detector has developed a broad and systematic search program for dark matter production in LHC collisions. The results of these searches using the first 13 TeV data, their interpretation, and the design and possible evolution of the search program will be presented.
Speaker: Dr. Kate Whalen (University of Oregon)
• 17:00
Reducing Fine Tuning in Composite Higgs Models 20m
Composite Higgs models (CHMs) are a popular solution to the SM hierarchy problem. However, they typically require an unsatisfying degree of fine tuning to reproduce the observed SM Higgs and top masses. I will present an overview of typical CHMs, including where their sources of fine tuning can be found. To analyse the interdependencies between observables in models such as these, a more sophisticated measure of fine tuning will be introduced. This new measure will be applied to several recent CHMs, which have been developed from either higher dimensional arguments, or from fundamental interactions. Some strategies for producing a natural Composite Higgs will be discussed.
Speaker: Mr. Daniel Murnane (University of Adelaide, University of Southern Denmark)
• 17:20
Measurements, status and plans of the TOTEM experiment at the LHC 15m
The TOTEM collaboration at the LHC has measured the elastic, inelastic and total proton-proton cross sections at several center of mass energies and is carrying on a rich program of measurements of diffractive physics together with the CMS collaboration. The talk will review the TOTEM measurements mainly focusing on the newest and most significant ones. The status of the experimental apparatus, its latest changes and the current and future technological challenges will be discussed as well.
Speaker: Dr. Fabrizio Ferro (INFN Genova)
• 17:35
Diffraction Scattering: Current Problems in Theory and Praxis 15m
This is a cursory review of recent results on diffraction processes from the LHC and related problems in theory and phenomenology.
Speaker: Prof. Vladimir Petrov (A. A. Logunov Institute for High Energy Physics, NRC KI)
• 17:50
Probing the chirality of leptoquark couplings in the light of $R_{D^{(*)}},R_{K^{(*)}}$ puzzle 15m
Anomalies in recent LHCb and Babar measurements of $R_{D^{(*)}}$, and $R_{K^{(*)}}$ in $B$ decays may indicate the new physics beyond the Standard Model (SM). The leptoquarks (LQ) that couple to the $3^{\mathrm{rd}}$ generation quarks and leptons have been proposed as a viable new physics (NP) explanation. Such left-handed LQs can couple to both bottom and top quarks. Since top particles decay before the hadronization, it is possible to reconstruct chirality of boosted top quarks and consequently the chirality of top coupling to the LQs. We perform analysis on the top quark's chirality in the pair-production channel of the LQ, which can be pure left-handed in comparison to unpolarized $t\bar{t}$ SM background. We study the prospects of distinguishing the chirality of a potential LQ signal for the high luminosity run of the LHC.
Speaker: Joydeep Roy (Wayne State University)
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