BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Astrophysics and beyond the Standard Model of particle physics in the NOvA experiment DTSTART;VALUE=DATE-TIME:20221202T153000Z DTEND;VALUE=DATE-TIME:20221202T155000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3218@cern.ch DESCRIPTION:Speakers: Oleg Samoylov (Joint Institute for Nuclear Research) \nNOvA is currently operating 2nd generation long-baseline neutrino oscill ation experiment\, based on NuMI complex at Fermilab (USA)\, having two la rge highly-segmented liquid scintillator detectors it has precise capabili ty to measure neutrino’s and many other particle physics aspects. During the last several years NOvA have got and published important results on n eutrino oscillation properties for both so-called active and sterile neutr inos\, as well as neutrino interaction cross-section with matter\, on astr ophysics topics and beyond known properties of the matter.\nNOvA goals inc lude Astrophysical and Beyond the Standard Model program\, what contains s earches for magnetic monopoles\, dark matter\, neutron-antineutron oscilla tion and any types of so-called exotics signals\, supernova neutrino detec tion\, multi-messenger astronomy\, and detailed characterisation of the co smic ray fluxes. Several analysis already show promising interim results a nd the physics potential of them continues to improve with exposure\, oper ating until late mid-twenties.\nNext generation experiments are planned an d built as multipurpose projects\, often involving many parallel studies i n particle physics and astrophysics. The potential of some of them for dar k matter\, physics beyond the standard model\, and other exotic searches w ill be considered in the talk.\n\nhttps://indico.particle.mephi.ru/event/2 75/contributions/3218/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3218/ END:VEVENT BEGIN:VEVENT SUMMARY:Resonance structure of the charge-exchange strength function of Te llurium isotopes 128 and 130. DTSTART;VALUE=DATE-TIME:20221202T163500Z DTEND;VALUE=DATE-TIME:20221202T165000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3226@cern.ch DESCRIPTION:Speakers: Almaz Fazliakhmetov (INR RAS\, Kurchatov Institute\, MIPT)\nThis work presents the charge-exchange strength functions S(E) of isotopes 128\,130Te. Both experimental data on the S(E) charge-exchange st rength functions obtained in (3He\, t) reactions and the S(E) strength fun ctions calculated in the microscopic theory of finite fermi-systems are an alyzed. The resonance structure of the strength function S(E) is investiga ted\, and the Gamow-Teller and Pygmy resonances are distinguished. The re sonance structure of the power function S(E) is crucial for the calculatio n and analysis of neutrino capture by atomic nuclei. The possibility of us ing these isotopes in next-generation neutrino experiments is also discuss ed\, in particular in the Baxan Large Neutrino Telescope project.\n\nhttps ://indico.particle.mephi.ru/event/275/contributions/3226/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3226/ END:VEVENT BEGIN:VEVENT SUMMARY:Flavoured leptogenesis in a minimal type-I+II seesaw mechanism DTSTART;VALUE=DATE-TIME:20221202T162000Z DTEND;VALUE=DATE-TIME:20221202T163500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3217@cern.ch DESCRIPTION:Speakers: Sreerupa Chongdar (PhD Scholar\, Department of Physi cs and Astronomy\, National Institute of Technology Rourkela)\nThe seesaw mechanism is a popular approach to give a viable explanation for the sourc e of non-zero neutrino mass and for the cause of matter dominance of the U niverse - two of the most important open problems that could not be answer ed in the Standard Model (SM) of Particle Physics. A minimal extension of the SM is studied\, incorporating a type-I+II seesaw mechanism with only o ne right-handed neutrino and one Higgs triplet scalar. These heavy particl es contribute to the generation of tiny neutrino mass\, which is inversely proportional to the corresponding heavy particle masses. Considering that leptogenesis is achieved by the decay of the right-handed neutrino\, the new source of CP asymmetry comes solely from the decay of the right-handed neutrino by one-loop vertex correction involving the Higgs triplet scalar . The model's predictability enhances by introducing Fritzsch type 2-zero and 3-zero textures for the neutrino mass matrix and the non-diagonal char ged lepton mass matrix\, respectively. We execute the parameter space stud y following the latest neutrino oscillation parameter data\, and the pheno menological importance of this hybrid texture is analyzed. We study leptog enesis in the two-flavoured and three-flavoured regimes\, and we observe t hat the leptogenesis in different flavoured regimes\, within the temperatu re range $T\\subset[10^{10}\,10^{11}]$ GeV\, can efficiently predict baryo n asymmetry of the Universe within experimentally obtained range.\n\nhttps ://indico.particle.mephi.ru/event/275/contributions/3217/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3217/ END:VEVENT BEGIN:VEVENT SUMMARY:Hubble tension\, dark matter and neutrino DTSTART;VALUE=DATE-TIME:20221202T160500Z DTEND;VALUE=DATE-TIME:20221202T162000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3214@cern.ch DESCRIPTION:Speakers: Chitta Ranjan Das (Bogoliubov Laboratory of Theoreti cal Physics\, Joint Institute for Nuclear Research)\nIn the CDM universe\, the Hubble constant is the only cosmological parameter that can be measur ed both locally and indirectly by traditional cosmological methods like th e CMB\, baryon acoustic oscillations\, supernovae\, and big-bang nucleosyn thesis. It is also simple to comprehend\, and because the error bars are g etting so narrow\, the CDM model truly depends on it. Everyone awoke as a result of the Hubble stress. But we need more before we throw the model ou t the window. Most of the observations we have of the cosmos can be explai ned by a model with only six parameters\, most of which are limited at the percent level. We have been riding a tsunami of CDM model confirmation fo r the past 20 years\, so we must ask ourselves: If we are going to get rid of it\, what do we replace it with? The first stage is to depart from the model in small steps\, such as by adding one additional parameter. A solu tion like this used to suit the CMB data\, but it no longer does. For a wh ile\, one could argue that perhaps there is something like an effective ne utrino species that could solve the problem.\n\nhttps://indico.particle.me phi.ru/event/275/contributions/3214/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3214/ END:VEVENT BEGIN:VEVENT SUMMARY:Oscillations of astrophysical neutrinos in various gravitational b ackgrounds DTSTART;VALUE=DATE-TIME:20221202T155000Z DTEND;VALUE=DATE-TIME:20221202T160500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3216@cern.ch DESCRIPTION:Speakers: Maxim Dvornikov (Institute of Terrestrial Magnetism\ , Ionosphere and Radiowave Propagation (IZMIRAN))\nThe neutrino propagatio n and oscillations in various gravitational fields are studied. First\, we consider the neutrino scattering off a rotating black hole accounting for the neutrino spin precession. Then\, we study the evolution of flavor neu trinos\, emitted in a supernova explosion\, in stochastic gravitational wa ves. The astrophysical applications of the obtained results are considered .\n\nReferences\n\n 1. M. Dvornikov\, Neutrino scattering off a black hole surrounded by a\n magnetized accretion disk. JCAP 04\, 005 (2021) [arXiv:2102.00806].\n 2. M. Dvornikov\, Interaction of supernova neutrinos with stochastic gravitational waves. Phys. Rev. D 104\, 043018 (2021)\n [arXiv:2103.15464].\n\nhttps://indico.particle.mephi.ru/event/275/co ntributions/3216/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3216/ END:VEVENT BEGIN:VEVENT SUMMARY:Baksan Large Neutrino Telescope Project DTSTART;VALUE=DATE-TIME:20221202T151500Z DTEND;VALUE=DATE-TIME:20221202T153000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3213@cern.ch DESCRIPTION:Speakers: Arslan Lukanov ()\nA large-volume liquid scintillato r neutrino detector is proposed to develop at the Baksan Neutrino Observat ory of Institute for Nuclear Research of the Russian Academy of Sciences i n the North Caucasus. The detector will be located at the depth of 4700 m. w.e. (meter of water equivalent). A target mass of the detector will be 10 kt. This multipurpose detector is being developed to study primarily natu ral neutrino and antineutrino fluxes namely fluxes of solar neutrinos\, ge oneutrinos and neutrinos from other astrophysical sources. This project\, if implemented\, would be a successor of the Borexino experiment and other European projects like LENA. The project is aimed to have a record energy resolution\, which along with its location at the large depth and relativ ely far distance from operating nuclear reactors will allow reaching a rec ord sensitivity to the natural neutrino and antineutrino fluxes. We report in the paper the present status of the project and describe some selectiv e results of the project first stage — the detector prototype with liqui d scintillator mass of 0.5 t. Results of R&D for the project second stage with 5 tons of liquid scintillator are presented too.\n\nhttps://indico.pa rticle.mephi.ru/event/275/contributions/3213/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3213/ END:VEVENT BEGIN:VEVENT SUMMARY:Baksan Neutrino Observatory. Current status and future experiments . DTSTART;VALUE=DATE-TIME:20221202T150000Z DTEND;VALUE=DATE-TIME:20221202T151500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3221@cern.ch DESCRIPTION:Speakers: Valery Petkov (INR RAS)\nThe Baksan Neutrino Observa tory (BNO) of the Institute for Nuclear Research of the Russian Academy of Sciences is a unique complex of ground and underground installations desi gned to solve fundamental problems in various fields of science: from neut rino astrophysics to geophysics. The scientific research program of the BN O is constantly changing\, as old problems are exhausted and new problems appear\, and new physical installations are put into operation.\nThe repor t provides an overview of the current state and discusses the program for the development of the Baksan Neutrino Observatory. New results obtained a t operating BNO installations are presented.\n\nhttps://indico.particle.me phi.ru/event/275/contributions/3221/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3221/ END:VEVENT BEGIN:VEVENT SUMMARY:Detection of solar neutrinos from the CNO cycle with Borexino DTSTART;VALUE=DATE-TIME:20221202T144500Z DTEND;VALUE=DATE-TIME:20221202T150000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3215@cern.ch DESCRIPTION:Speakers: Alina Vishneva (DLNP JINR)\nCNO cycle of thermonucle ar reactions is one of the two main energy production mechanisms in the ma in sequence stars\, dominant in those heavier than the Sun.\nIn the contex t of solar physics\, despite its minor role in the energy production\, the CNO cycle is of a particular interest for it is directly related to the a bundance of heavy elements in the solar core.\nThe Borexino experiment pro vided the first experimental evidence of the CNO cycle in the Sun by detec ting neutrinos emitted in its reactions.\nThis measurement is made possibl e thanks to the unprecedented radiopurity of the detector and advanced met hods of constraining the correlated background allowing to pick out a rela tively weak and featureless CNO neutrino signal.\nIn this work we present the recent update of the CNO neutrino flux measurement along with the firs t evaluation of the C and N abundance in the Sun based on the neutrino dat a only.\n\nhttps://indico.particle.mephi.ru/event/275/contributions/3215/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3215/ END:VEVENT BEGIN:VEVENT SUMMARY:HIGH FLUX ELECTRON ANTINEUTRINO SOURCES BASED ON LI-8 ISOTOPE. THE POSSIBILITY TO CONSTRUCT THE COMPACT VARIANT DTSTART;VALUE=DATE-TIME:20221202T094500Z DTEND;VALUE=DATE-TIME:20221202T100000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3210@cern.ch DESCRIPTION:Speakers: Vladimir Lyashuk (ИЯИ РАН\, НИЦ Курча товский институт)\nThe creation of the artificial MeV-energ y electron antineutrino sources moves forward the serious demands for used isotopes and nuclear reactions for realization of the task: well defined and hard neutrino spectrum (taking in mind the proportionality of the cros s section to square energy)\; availability and purity of the chosen isotop e. The Li-7 (92.5% in the natural lithium) isotope fully satisfies to thes e requirements: at (n\,gamma)-activation of the high purity Li-7 isotope i n the high neutron flux the created Li-8 is β-decayed (T1/2= 0.84 s) with escape of hard and known electron antineutrino spectrum ( E(max)= 13 MeV and E(average)= 6.5 MeV). The spectrum of nuclear reactors traditionally u sed as intensive neutrino sources are characterized with significant error s [(4-6)% -precision at energy up to ~6 MeV] caused by unknown decay schem es\, change of fuel isotopes parts in time\, spent nuclear fuel close to r eactors\, that put together cause an unsolved puzzles in interpretation of neutrino oscillation [1]. The critical problem of the spectrum precision can be solved basing on the Li-7 isotope.\nThe construction of the intensi ve electron antineutrino-source is possible in different schemes (ensured with intensive neutron flux) on the base of: nuclear reactors\, in the ac celerator scheme with neutron producing target plus Li-7-blanket [2]. Real ization of the first variant is possible in the transport regime (when an activated Li-7 is pumped in the continuous close cycle through the active zone of the reactor). The strong advantages of the sheme is possibility: t o ensure the high neutrino flux in the compact volume (~cubic meter) of th e detector (close to the loop) [3] and to decrease the total spectrum erro rs in order of values [4].\nIn the accelerator scheme the proton beam stri ke into the heavy-element-target and produces the significant neutron yiel d for the lithium blanket irradiation. The scheme is considered for energi es up to ~600 MeV for different heavy targets (W\, Pb\, Vi\, Ta). The dens ity of Li-8 creation is simulated in details that allowed to propose an ef fective blanket scheme with central lithium containing volume enclosed by carbon (acting as an effective neutron reflector) and outer thick water la yer for diminish the neutron escape. The analysis of Li-8 distribution in the blanket allows to construct a small-volume elecytron antineutrino sour ce (with dimension ~70 cm) that is exclusively important for search of ste rile neutrinos in case of Delta_m2 ~ 1 eV2 [ 5] scale.\n\n1. C. Giunti\, Y .F. Li\, C.A. Ternes\, and Z. Xin. arXiv:2110.06820 (2022).\n2. V.I. Lyash uk & Yu.S. Lutostansky. Bull. Russ. Acad. Sci. Phys. 79\, 431–436 (2015) . https://doi.org/10.3103/S106287381504022X\n3. V.I. Lyashuk. JHEP06 (201 9)135. DOI: 10.1007/JHEP06(2019)135\n4. V.I. Lyashuk. Results Phys. 7\, 12 12 (2017). https://doi.org/10.1016/j.rinp.2017.03.025.\n5. J. Kopp\, M. Ma ltoni and T. Schwetz\, Phys. Rev. Lett. 107\, 091801 (2011). DOI:https://d oi.org/10.1103/PhysRevLett.107.091801\n\nhttps://indico.particle.mephi.ru/ event/275/contributions/3210/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3210/ END:VEVENT BEGIN:VEVENT SUMMARY:Tagged neutrino beam in the P2O experiment DTSTART;VALUE=DATE-TIME:20221202T093000Z DTEND;VALUE=DATE-TIME:20221202T094500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3211@cern.ch DESCRIPTION:Speakers: Anatoly Sokolov (National Research Centre "Kurchatov Institute" – IHEP\, Protvino\, Moscow region\, Russia)\nMomentum of an interacting neutrino is known with a poor accuracy in accelerator-based ne utrino experiments. The type and chirality of neutrino interacting in the detector are also often not exactly known in these experiments. These prob lems could be solved by using a new experimental method called neutrino ta gging. The method consists in exploiting the kinematics of the neutrino pr oduction process\, the $\\pi^\\pm \\rightarrow \\mu^\\pm + \\nu_\\mu(\\wid etilde \\nu_\\mu)$ decay. In tagged neutrino beams simultaneously with the registration of neutrino interaction in the detector a special tagging st ation measures the momentum of the parent particle\, as well as the moment um of charged particle from $\\pi^\\pm \\rightarrow \\mu^\\pm + \\nu_\\mu( \\widetilde \\nu_\\mu)$ decay. Then it is possible to reconstruct the m omentum and the type of a produced neutrino with a high accuracy. The main problem in tagged neutrino beams construction is how to relate the neutri no interaction to the corresponding parent particle decay. For this\, both temporal and spatial referencing of events registered in the neutrino det ector and in the tagging station detectors are used.\nIn this paper\, we d escribe a technique for the tagged neutrino production from $\\pi^\\pm \\ rightarrow \\mu^\\pm + \\nu_\\mu(\\widetilde \\nu_\\mu)$ decays at the U-7 0 (Protvino) accelerator complex. A description of the method and achievab le key performances is presented\, together with its potential benefits fo r long baseline experiment P2O (Protvino to ORCA).\n\nhttps://indico.parti cle.mephi.ru/event/275/contributions/3211/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3211/ END:VEVENT BEGIN:VEVENT SUMMARY:Designing a tagged neutrino beam at the U-70 accelerator complex DTSTART;VALUE=DATE-TIME:20221202T091500Z DTEND;VALUE=DATE-TIME:20221202T093000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3212@cern.ch DESCRIPTION:Speakers: Roman Sinyukov (National Research Centre "Kurchatov Institute" – IHEP)\nSpecialized muon neutrino beams at high-energy proto n accelerators are produced as tertiary particles from $\\pi^\\pm\,K^\\pm \\rightarrow \\mu^\\pm + \\nu_\\mu(\\widetilde \\nu_\\mu)$ decays. The neu trino channel itself generally consists of a focusing system that forms $\ \pi\,K$ mesons beams at the required momentum and angular intervals and a free decay section ending by hadronic and muon absorbers.\nTo organize a n eutrino channel at IHEP\, it is proposed to use a proton beam with an 60 G eV energy\, slowly extracted from the accelerator U-70\, with an intensity of up to 10$^{13}$ particles per cycle\, about 9 seconds long. In the pap er the basic optical scheme of the neutrino channel is considered and the main design characteristics of the generated beams are discussed. The para meters of neutrino beams in the near and far detectors located at distance s of 100 m and 2595 km\, respectively\, after the end of the decay channel \, as well as characteristics of the $\\pi$-meson beam at the beginning of the decay region\, are presented. The parameters of tagged neutrino beams in the near and far detectors are given. The calculation results are give n for 10$^{13}$ protons dropped onto the target per accelerator cycle.\nA simplified scheme is used in the calculations\, in which the only sources of muon neutrinos are the decays of $\\pi$ mesons\, and all pions entering the matter during transport through the channel are excluded from a consi deration. Primary protons that do not interact in the target are also excl uded from a consideration.\n\nhttps://indico.particle.mephi.ru/event/275/c ontributions/3212/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3212/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino physics in the CERN project SND@LHC DTSTART;VALUE=DATE-TIME:20221202T090000Z DTEND;VALUE=DATE-TIME:20221202T091500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3220@cern.ch DESCRIPTION:Speakers: Natalia Polukhina (Lebedev Physical Institute of Rus sian Academy of Sciences)\nAt the beginning of 2021\, the project of the S ND@LHC experiment was adopted by CERN - this is a compact experiment desig ned to study all three neutrino flavors and search for weakly interacting particles at the LHC in the pseudorapidity range of $7.2\n\nhttps://indico .particle.mephi.ru/event/275/contributions/3220/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3220/ END:VEVENT BEGIN:VEVENT SUMMARY:AMoRE experiment: search for the neutrinoless double beta decay of 100Mo isotope DTSTART;VALUE=DATE-TIME:20221202T084500Z DTEND;VALUE=DATE-TIME:20221202T090000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3219@cern.ch DESCRIPTION:Speakers: Vasily Kornoukhov (НИЯУ МИФИ)\nAMoRE (Advanc ed Mo based Rare process Experiment) is an international collaboration sea rching for the neutrinoless double beta decay of 100Mo using scintillating molybdate crystals with metallic magnetic calorimeters as low temperature sensors. AMoRE-I\, as the first phase experiment with 6\,2 kg of the calc ium and lithium molybdate crystals\, has been installed at the Yangyang un derground laboratory (Y2L) and is accumulating the data. AMoRE-II main pha se experiment\, using 200 kg of lithium molybdate crystals\, will be insta lled at the Yemi underground laboratory (Yemilab)\, newly constructed at d eeper (1 km overburden) and larger space for future experiments. Here\, we present the current status of the AMoRE-I and preparation of the AMoRE-II phase.\n\nhttps://indico.particle.mephi.ru/event/275/contributions/3219/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3219/ END:VEVENT BEGIN:VEVENT SUMMARY:Commissioning of LEGEND-200 experiment DTSTART;VALUE=DATE-TIME:20221202T083000Z DTEND;VALUE=DATE-TIME:20221202T084500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3225@cern.ch DESCRIPTION:Speakers: Nadezda Rumyantseva (JINR)\nThe LEGEND experiment is designed to search for neutrinoless double beta decay of Ge-76. Its first stage\, LEGEND-200\, is located at the Laboratori Nazionali del Gran Sass o (LNGS\, Italy). About 200 kg of germanium detectors isotopically enriche d in Ge-76 are going to be immersed in liquid argon (LAr) cryostat togethe r with the LAr instrumentation system. The LEGEND-200 goal is to improve t he background by a few times compared with the predecessors and reach the double-beta sensitivity of 10^27 years. The commissioning of the experime nt is ongoing. In May 2022 main elements of the installation were assemble d and about 60 kg of germanium detectors were immersed in a cryostat in or der to debug all experimental systems. At the time of the conference\, an almost full-scale launch of the experiment should be completed using all a vailable detectors (~100 detectors with total mass ~ 140 kg of enriched ge rmanium).\nThe aim of the talk is to present the actual status of LEGEND-2 00 mainly focus on the commissioning details.\n\nhttps://indico.particle.m ephi.ru/event/275/contributions/3225/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3225/ END:VEVENT BEGIN:VEVENT SUMMARY:Sensitivity of DarkSide-50 experiment to double K-capture on Ar-36 . DTSTART;VALUE=DATE-TIME:20221202T081500Z DTEND;VALUE=DATE-TIME:20221202T083000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3223@cern.ch DESCRIPTION:Speakers: Olga Lychagina (JINR\, MSU)\nThe search for neutrino enter code hereless double $\\beta$-decay\, in particular double K-capture \, is of great importance. Confirmation of its existence would mean that t he neutrino is Majorana particle. The investigation of this process provid es one of the best opportunities to study physics beyond the Standard Mode l. The double electron capture process 2EC2$\\nu$ was experimentally disco vered only once in the XENON1T experiment\, and the search for 2EC0$\\nu$ has so far been unsuccessful. These processes are very difficult to regist er. There are 34 candidate isotopes in which the 2EC2$\\nu$ process is pos sible\; 12 nuclei can experience only two-neutrino 2$e$-capture. Previousl y\, the search for these processes was carried out on $^{78}$Kr and $^{124 }$Xe\, since the lower theoretical predictions of their half-lives lie in the experimentally achievable region is $\\sim$ 10$^{22}$ years\, and they are relatively accessible isotopes of inert gases. The purpose of this wo rk is to evaluate the sensitivity of the DarkSide-50 experiment to two-neu trino double electron capture on the $^{36}$Ar isotope. To achieve the goa l of the study\, the following tasks were performed:\n\n- development of a software module for constructing the energy spectrum of double electron c apture (2EC2$\\nu$) on $^{36}$Ar\;\n- vapplication of the detector respons e function due to this effect for the DarkSide-50 detector\;\n- statistica l analysis of data using a model spectrum\;\n- obtaining a lower limit for the half-life of $^{36}$Ar.\n\nThe novelty of this work is in the fact th at such processes have not previously been studied on the argon isotope $^ {36}$Ar. The analysis performed in this work will remain relevant in the f uture.\n\nhttps://indico.particle.mephi.ru/event/275/contributions/3223/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3223/ END:VEVENT BEGIN:VEVENT SUMMARY:The KamLAND-Zen experiment - a decade after the first result DTSTART;VALUE=DATE-TIME:20221202T080000Z DTEND;VALUE=DATE-TIME:20221202T081500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3224@cern.ch DESCRIPTION:Speakers: Alexandr Kozlov (MEPhI)\nThe KamLAND-Zen experiment provided new stringent constraints on the neutrinoless double-beta (0νβ β) decay half-life in Xe-136 using a xenon-loaded liquid scintillator. Im proved search was based on an upgraded detector with almost double the amo unt of enriched xenon and an ultra-low radioactivity container\, correspon ding to an exposure of 970 kg yr of Xe-136. This new data provides valuabl e insight into backgrounds\, especially from cosmic muon spallation of xen on\, and has required the use of novel background rejection techniques. We obtained a lower limit for the 0νββ decay half-life of T1/2 > 2.3 × 1 0^26 yr at 90% C.L.\, corresponding to upper limits on the effective Major ana neutrino mass of 36 – 156 meV using commonly adopted nuclear matrix element calculations.\n\nhttps://indico.particle.mephi.ru/event/275/contri butions/3224/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3224/ END:VEVENT BEGIN:VEVENT SUMMARY:Exposition of the RED-100 two-phase emission detector at the Kalin in NPP for the study of coherent elastic neutrino scattering off Xenon nuc lei DTSTART;VALUE=DATE-TIME:20221201T094500Z DTEND;VALUE=DATE-TIME:20221201T100000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3209@cern.ch DESCRIPTION:Speakers: Alexander Bolozdynya (NRNU MEPhI)\nThe RED-100 two-p hase emission detector with 200 kg of liquid xenon as a working medium was exhibited at a distance of 19 m from the core of the VVER-1000/320 nuclea r power reactor at the 4th power unit of the Kalinin NPP in 2021-2022. Due to its high sensitivity to weak ionization signals (down to single electr ons)\, the RED-100 detector was used to observe elastic coherent scatterin g of electron antineutrinos off xenon nuclei. A set of experimental data w as obtained in the regimes with the reactor on and off. The results obtain ed are discussed.\n\nhttps://indico.particle.mephi.ru/event/275/contributi ons/3209/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3209/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of nuGeN experiment at Kalinin Nuclear Power Plant on coher ent elastic neutrino-nucleus scattering DTSTART;VALUE=DATE-TIME:20221201T093000Z DTEND;VALUE=DATE-TIME:20221201T094500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3208@cern.ch DESCRIPTION:Speakers: Alexey Lubashevskiy (JINR)\nThe $\\nu$GeN experiment is aimed to study neutrino scattering at the close vicinity of the reacto r core of Kalinin Nuclear Power Plant (KNPP) at Udomlya\, Russia. Its main interests are connected with the detection of coherent elastic neutrino-n ucleus scattering (CE$\\nu$NS)\, the search for the magnetic moment of neu trino and other rare processes. The experimental setup is constructed unde r reactor unit #3 of KNPP at a distance of about 10 m from the center of t he 3.1 GW$_{th}$ core. In this way\, we obtain an enormous antineutrino fl ux of more than 5x10$^{13}$ $\\nu$/cm$^2$/s. Materials of the reactor surr ounding provide about 50 m w.e. overburden\, that serves as a good shieldi ng against cosmic radiation. In combination with a low ambient background\ , it gives us a unique opportunity to investigate antineutrino properties at the best experimental location in the world. A special lifting mechanis m allows moving the spectrometer towards the reactor core changing the neu trino flux and thus suppressing main systematic errors caused by possible long-term instability and insufficient knowledge of neutrino flux. To dete ct signals from the neutrino scattering we use high-purity low-threshold g ermanium detector surrounded by passive and active shielding. A specially developed acquisition system allows suppressing events that correspond to noise. A detailed description of the experimental setup will be shown. The current status of data taking and comparison of the spectra with reactor on and off regimes will be presented.\n\nhttps://indico.particle.mephi.ru/ event/275/contributions/3208/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3208/ END:VEVENT BEGIN:VEVENT SUMMARY:The COHERENT experiment DTSTART;VALUE=DATE-TIME:20221201T091500Z DTEND;VALUE=DATE-TIME:20221201T093000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3203@cern.ch DESCRIPTION:Speakers: Alexey Konovalov (MEPhI)\nThe COHERENT collaboration aims to test the Standard model with the help of coherent elastic neutrin o-nucleus scattering (CEvNS). The experimental effort involving multiple d etectors takes place at the Spallation Neutron Source in Oak Ridge Nationa l Laboratory. In this talk we decribe the results\, status\, and prospects of the COHERENT program. In particular\, recently evaluated limits on the non-standard neutrino-quark couplings and parameters of accelarator produ ced dark matter are presented.\n\nhttps://indico.particle.mephi.ru/event/2 75/contributions/3203/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3203/ END:VEVENT BEGIN:VEVENT SUMMARY:Determination of neutrino oscillation parameters of transitions to sterile states in the BEST-2 experiment DTSTART;VALUE=DATE-TIME:20221201T090000Z DTEND;VALUE=DATE-TIME:20221201T091500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3222@cern.ch DESCRIPTION:Speakers: Valery Gorbachev (BNO INR RAS)\nIn measurements with intense artificial sources of monochromatic neutrinos on gallium targets\ , a capture rate equal to 0.80 ± 0.05 of the expected was obtained. The m easured lack of capture rate is known as the gallium anomaly (GA). Neutrin o oscillation transitions with large values of the parameter Δm2 (~ 1 eV2 ) are considered a possible cause of GA. In the proposed BEST-2 experiment \, the GA will not only be tested with high accuracy\, but also the parame ters of the oscillations will be measured if they are in the sensitivity r ange of the experiment. In the BEST-2 experiment\, a gallium target consis ting of 50 tons of metallic gallium and divided into 3 independent zones w ill be irradiated with neutrinos from a 65Zn source.\n\nhttps://indico.par ticle.mephi.ru/event/275/contributions/3222/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3222/ END:VEVENT BEGIN:VEVENT SUMMARY:New nuclear reactor fissile isotopes antineutrino spectra DTSTART;VALUE=DATE-TIME:20221201T084500Z DTEND;VALUE=DATE-TIME:20221201T090000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3207@cern.ch DESCRIPTION:Speakers: Valery Sinev (INR RAS)\nNew antineutrino spectra of fissile isotopes constituting the fuel of a nuclear reactor have been obta ined. A combined technique was used: calculation of the antineutrino spect ra and their fitting to those obtained in the experiment at the Rovno NPP in the 1980s. The cross sections of fissile isotopes calculated with these spectra perfectly describe the experimentally obtained cross section in t he Double Chooz experiment $^{DC}\\sigma_f = (5.71 \\pm 0.06) \\cdot 10^{- 43}$ cm$^2$/fission. The cross section obtained from the calculated spectr a for the same composition of nuclear reactor core $^{INR}\\sigma_f = (5.8 2 \\pm 0.12) \\cdot 10^{-43}$ cm$^2$/fission. For the obtained spectra\, t here is no problem of spectrum bump in the region of 5 MeV in the observed energy of the positron spectrum.\n\nhttps://indico.particle.mephi.ru/even t/275/contributions/3207/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3207/ END:VEVENT BEGIN:VEVENT SUMMARY:iDREAM detector at Kalinin NPP: antineutrino signal\, backgrounds and prospects DTSTART;VALUE=DATE-TIME:20221201T083000Z DTEND;VALUE=DATE-TIME:20221201T084500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3205@cern.ch DESCRIPTION:Speakers: Evgeny Litvinovich (NRC Kurchatov Institute)\nIndust rial Detector of REactor Antineutrinos for Monitoring (iDREAM) is a protot ype detector designed to demonstrate the feasibility of antineutrino detec tors for remote reactor monitoring and safeguard purposes. The 1 ton Gd-do ped liquid scintillator detector is mounted in the Kalinin nuclear power plant (Russia)\, 20 m from the 3 GW$_{th}$ VVER type commercial reactor. A ntineutrinos are detected via inverse beta decay on protons. The detector took data both in reactor ON and OFF modes. In this talk the iDREAM measur ements of the accidental and correlated backgrounds will be discussed. T he iDREAM antineutrino data and the detector prospects will be reviewed  in the framework of applied antineutrino physics.\n\nhttps://indico.partic le.mephi.ru/event/275/contributions/3205/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3205/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of the absolute reactor antineutrino energy spectrum dependence on the fuel composition DTSTART;VALUE=DATE-TIME:20221201T081500Z DTEND;VALUE=DATE-TIME:20221201T083000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3206@cern.ch DESCRIPTION:Speakers: Nataliya Skrobova ()\nDANSS is a one cubic meter hig hly segmented solid scintillator detector. It consists of 2500 scintillato r strips\, covered with gadolinium loaded reflective coating and read out with SiPMs and PMTs via wavelength shifting fibers. DANSS is placed under a 3.1 GW industrial reactor at the Kalinin NPP (Russia) on a movable plat form. The distance from the reactor core center is varied from 10.9 m to 1 2.9 m on-line. The inverse beta decay (IBD) process is used to detect anti neutrinos. DANSS detects about 5000 IBD events per day with the background from cosmic muons at the level of few percent.\nIn this talk we present r esults on the neutrino spectrum dependence on the fuel composition. We hav e also measured the reactor power using the IBD event rate during almost 6 years with the statistical accuracy 1.5% in 2 days and with the relative systematic uncertainty of about 0.5%. The limits in sterile neutrino param eter space based on information about absolute counting rates are also pre sented.\n\nhttps://indico.particle.mephi.ru/event/275/contributions/3206/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3206/ END:VEVENT BEGIN:VEVENT SUMMARY:Resent results from the DANSS experiment DTSTART;VALUE=DATE-TIME:20221201T080000Z DTEND;VALUE=DATE-TIME:20221201T081500Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3204@cern.ch DESCRIPTION:Speakers: Igor Zhitnikov (JINR)\nSolid state spectrometer of r eactor antineutrino DANSS is placed\nbelow the core of the 3.1 GWt_th indu strial nuclear reactor of \nKalininskaya NPP. In the closest position to t he reactor \nthe detector counts more than 5000 inverse beta-decay (IBD) e vents\nper day with background below 2 %. The distance to the reactor is\n changed weekly between 10.9 and 12.9 m\, which allows to make a \nmodel-fr ee search for a short range neutrino oscillations. Spectrum\nevolution wit h the distance is measured directly by the same detector.\n\nThe talk is b ased on the statistics of 6 million events\,\nobtained during 6 years betw een April 2016 and March 2022. \nWe present limits in the short range osci llation \nparameter space. We also compared the anti-neutrino \nenergy spe ctrum with theoretical predictions and \nconfirm a bump in their ratio sim ilar to the bumps \nobserved in several other experiments.\n\nhttps://indi co.particle.mephi.ru/event/275/contributions/3204/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3204/ END:VEVENT BEGIN:VEVENT SUMMARY:The Result of the Neutrino-4 Experiment and the Cosmological Const raints on the Sterile Neutrino DTSTART;VALUE=DATE-TIME:20221201T074000Z DTEND;VALUE=DATE-TIME:20221201T080000Z DTSTAMP;VALUE=DATE-TIME:20260307T212733Z UID:indico-contribution-189-3202@cern.ch DESCRIPTION:Speakers: Anatolii Serebrov (NRC "Kurchatov Institute" - PNPI) \nWe present a short discussion of the Neutrino-4 experimental results and the results of other experiments searching for the sterile neutrino. We e stimated the contribution of the sterile neutrino with parameters $\\Delta m^2_{14} \\approx 7.3 \\text{eV}^2$ and $\\sin^22\\theta_{14} \\approx 0 .36$ obtained in the Neutrino-4 experiment to the energy density of the Un iverse. We address the contradiction between the measured sterile neutrino parameters and the constraints on the sterile neutrino from cosmology. Wi th this article\, we want to draw attention to the problem of the contradi ction between experiment and theory\, in order to inspire the search for t heoretical models that include a sterile neutrino with mass in the region of several eV\, and to the necessity to sufficiently increase the precisio n of the experiment.\n\nhttps://indico.particle.mephi.ru/event/275/contrib utions/3202/ LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/275/contributions/3202/ END:VEVENT END:VCALENDAR