The NA64 experiment is a fixed-target experiment at the CERN SPS combining the active beam dump and missing energy techniques to search for rare events by colliding 100-150 GeV energy electron or muon beams onto an active target.
The talk presents the muon part of the experiment. The NA64-mu looks for the muon (g-2) anomaly and light dark matter with the semi-visible dark photon channel. The...
The Higgs boson in its vector boson fusion production mode and its decay to a pair of W bosons that in turn decay leptonically to a eνμν final state, is probed. The Large Hadron Collider delivered proton-proton collisions at a center-of-mass energy of 13 TeV between 2015 and 2018 which were recorded by the ATLAS detector, corresponding to an integrated luminosity of 139 fb−1. Deep Neural...
Higgs boson production via gluon-gluon fusion in proton-proton collisions is measured in the H→WW∗→eνμν decay channel. The utilized dataset is the √s=13 TeV proton-proton collision data collected by the ATLAS experiment during Run 2 of the Large Hadron Collider with an integrated luminosity of 139 fb−1. The total cross section for Higgs boson production by gluon-gluon fusion times the H→WW∗...
The search for anomalous couplings is an indirect model-independent way to find deviations from the Standard Model (SM). Effective field theory allows to parameterize these anomalous couplings in the Lagrangian, respecting the SM gauge symmetries, using operators of higher dimensions constructed from the SM fields. In the classical way of setting the limits on the operators (Wilson)...
A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton-proton collision data at a center-of-mass energy of 13 TeV, collected by the CMS experiment at the LHC in 2016-2018, corresponding to an integrated luminosity of 137 fb$^{−1}$. The search uses the decay channels Z → ee and Z → μμ. No...
We discuss a limits on a hidden sector models, which have been excluded recently by NA64e that is the electron fixed-target experiment at CERN SPS. Namely, new experimental bounds on Dark Photon, millicharged fermions and axion-like particles are obtained from the missing energy signatures of the electron beam incident on a lead target of NA64e.
Recent results on $B_c$ production and decays from the proton-proton collision data taken by the ATLAS experiment will be presented.
The measurement of the differential ratios of $B_c^+$ and $B^+$ production cross sections at 8 TeV will be shown.
New results on the $B_c$ decays to $J/\psi$ $D_s(*)$ final states obtained with the Run 2 data at 13 TeV will also be reported.
The first measurements of the transverse momentum
($p_{\rm{T}}$) spectra, integrated yields and mean $p_{\rm T}$ of $\Sigma^{0}$ and $\overline{\Sigma}^{0}$ hyperons
in pp collisions at $\sqrt{s} = 7$ TeV at the LHC are presented.
The $\Sigma^{0}$($\overline{\Sigma}^{0}$) is reconstructed
via its electromagnetic decay channel $\Lambda$($\overline{\Lambda}$)$\gamma$.
The $\Lambda$...
The NA65 (DsTau) experiment at CERN-SPS is studying tau-neutrino production process in proton-nucleus interaction and aims to improve significantly an accuracy of calculations of tau neutrino fluxes for accelerator based neutrino experiments. For detecting short lived particles (especially decaying via tau neutrino), the experiment uses a setup based on high resolution nuclear emulsions, that...
An overview of the latest results from Kaon experiments at CERN and the future prospect will be presented. The NA62 experiment collected the world's largest dataset of charged kaon decays in 2016-2018, leading to the first measurement of the branching ratio of the ultra-rare $K^+ \to \pi^+ \nu \bar\nu$ decay, based on 20 candidates.
The radiative kaon decay $K^+ \to \pi^0 e^+ \nu \gamma$...
Standard Model of high energy physics is very successful, but neutrino sector is not completely accommodated into it (e.g. neutrino oscillations). One of the possible solution is introduction of heavy sterile neutrino, which does not have any flavour and interacts with only flavour SM neutrinos via oscillations.
In this talk we present the preparatory studies dedicated to the future search...
