Accès ouvert
2022
article
OpenAlex
A. Tumasyan, W. Adam, J. W. Andrejkovic, T. Bergauer et autres
Abstract A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at $$ \sqrt{s} $$ s = 13 …
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Accès ouvert
2021
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer et autres
The first measurement of the dependence of γγ→μ^{+}μ^{-} production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions at sqrt[s_{NN}]=5.02 TeV, with an integrated luminosity of approximately 1.5 …
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Accès ouvert
2020
article
OpenAlex
Albert M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
With increasing instantaneous luminosity at the LHC come additional reconstruction challenges.At high luminosity, many collisions occur simultaneously within one proton-proton bunch crossing.The isolation of an interesting collision from the additional "pileup" collisions is needed for effective physics performance.In the CMS Collaboration, several …
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Accès ouvert
2020
article
OpenAlex
Albert M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
Machine-learning (ML) techniques are explored to identify and classify hadronic decays of highly Lorentz-boosted W/Z/Higgs bosons and top quarks.Techniques without ML have also been evaluated and are included for comparison.The identification performances of a variety of algorithms are characterized in simulated events …
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Accès ouvert
2018
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
The pseudorapidity distributions of dijets as functions of their average transverse momentum (p_{T}^{ave}) are measured in proton-lead (pPb) and proton-proton (pp) collisions. The data samples were collected by the CMS experiment at the CERN LHC, at a nucleon-nucleon center-of-mass energy of 5.02 …
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Accès ouvert
2018
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
A bstract Modifications of the properties of jets in PbPb collisions, relative to those in pp collisions, are studied at a nucleon-nucleon center-of-mass energy of $$ \sqrt{s_{\mathrm{N}\;\mathrm{N}}}=5.02 $$ s N N = 5.02 TeV via correlations of charged particles with the jet …
am, at, be
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