Measurement of Bs0 meson production in pp and PbPb collisions at sNN=5.02 TeV; Physics Letters B; Vol. 796

Measurement of Bs0 meson production in pp and PbPb collisions at sNN=5.02 TeV; Physics Letters B; Vol. 796

Bibliographic Details
Parent link:Physics Letters B
Vol. 796.— 2019.— [P. 168-190]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Sirunyan А. М., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Bergauer T. Thomas, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich, Okhotnikov V. V. Vitaly Vladimirovich
Summary:Title screen
The production cross sections of Bs0 mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel Bs0→J/ψϕ→μ+μ−K+K− at a center-of-mass energy of 5.02 TeV per nucleon pair and within the rapidity range |y|<2.4 using the CMS detector at the LHC. The pp measurement is performed as a function of transverse momentum (pT) of the Bs0 mesons in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The Bs0 production yield in PbPb collisions is measured in two pT intervals, 7 to 15 and 15 to 50 GeV/c, and compared to the yield in pp collisions in the same kinematic region. The nuclear modification factor (RAA) is found to be 1.5±0.6(stat)±0.5(syst) for 7-15 GeV/c, and 0.87±0.30(stat)±0.17(syst) for 15-50 GeV/c, respectively. Within current uncertainties, the Bs0 results are consistent with models of strangeness enhancement, and suppression by parton energy loss, as observed for the B+ mesons.
Language:English
Published: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
physics
quark gluon plasma
B meson
open heavy-flavor
Online Access:https://doi.org/10.1016/j.physletb.2019.07.014
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663749

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