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Measurement Of The B± Meson Nuclear Modification Factor In Pb-Pb Collisions At Snn =5.02 Tev, A. M. Sirunyam, A. R. Tumasyan, Adam Wolfgang, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Toohin S. Roy, Francisco X. Yumiceva
Measurement Of The B± Meson Nuclear Modification Factor In Pb-Pb Collisions At Snn =5.02 Tev, A. M. Sirunyam, A. R. Tumasyan, Adam Wolfgang, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Toohin S. Roy, Francisco X. Yumiceva
Aerospace, Physics, and Space Science Faculty Publications
The differential production cross sections of B± mesons are measured via the exclusive decay channels B±→J/ψK±→μ+μ-K± as a function of transverse momentum in pp and Pb-Pb collisions at a center-of-mass energy sNN=5.02 TeV per nucleon pair with the CMS detector at the LHC. The pp(Pb-Pb) data set used for this analysis corresponds to an integrated luminosity of 28.0 pb-1 (351 μb-1). The measurement is performed in the B± meson transverse momentum range of 7 to 50 GeV/c, in the rapidity interval |y|<2.4. In this kinematic range, a strong suppression of the production cross section by about a factor of 2 is observed in the Pb-Pb system in comparison to the expectation from pp reference data. These results are found to be roughly compatible with theoretical calculations incorporating beauty quark diffusion and energy loss in a quark-gluon plasma. © 2017 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the «https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Search For Supersymmetry In The All-Hadronic Final State Using Top Quark Tagging In Pp Collisions At Square Root Of S = 13 Tev, V. Khachatryan, A. M. Sirunyan, A. R. Tumasyan, Marc M. Baarmand, Stefano Colafranceschi, Vallary Bhopatkar, Daniel Noonan, Marcus Hohlmann, Tuhin S. Roy, Francisco X. Yumiceva
Search For Supersymmetry In The All-Hadronic Final State Using Top Quark Tagging In Pp Collisions At Square Root Of S = 13 Tev, V. Khachatryan, A. M. Sirunyan, A. R. Tumasyan, Marc M. Baarmand, Stefano Colafranceschi, Vallary Bhopatkar, Daniel Noonan, Marcus Hohlmann, Tuhin S. Roy, Francisco X. Yumiceva
Aerospace, Physics, and Space Science Faculty Publications
A search is presented for supersymmetry in all-hadronic events with missing transverse momentum and tagged top quarks. The data sample was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 2.3 fb-1 of proton-proton collisions at a center-of-mass energy of 13 TeV. Search regions are defined using the properties of reconstructed jets, the multiplicity of bottom and top quark candidates, and an imbalance in transverse momentum. With no statistically significant excess of events observed beyond the expected contributions from the standard model, we set exclusion limits at 95% confidence level on the masses of …
Measurement Of Differential Cross Sections For Top Quark Pair Production Using The Lepton + Jets Final State In Proton-Proton Collisions At 13 Tev, A. M. Sirunyan, V. Khachatryan, A. R. Tumasyan, Marc M. Baarmand, Marcus Hohlmann, Vallary Bhopatkar, Stefano Colafranceschi, Daniel Noonan, Tuhin S. Roy, Francisco X. Yumiceva
Measurement Of Differential Cross Sections For Top Quark Pair Production Using The Lepton + Jets Final State In Proton-Proton Collisions At 13 Tev, A. M. Sirunyan, V. Khachatryan, A. R. Tumasyan, Marc M. Baarmand, Marcus Hohlmann, Vallary Bhopatkar, Stefano Colafranceschi, Daniel Noonan, Tuhin S. Roy, Francisco X. Yumiceva
Aerospace, Physics, and Space Science Faculty Publications
Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at 13 TeV are measured as a function of jet multiplicity and of kinematic variables of the top quarks and the top quark-antiquark system. This analysis is based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 2.3 fb-1. The measurements are performed in the lepton+jets decay channels with a single muon or electron in the final state. The differential cross sections are presented at particle level, within a phase space close to the experimental acceptance, and at …