Measurement of B0s meson production in pp and PbPb collisions at sqrt(s[NN]) = 5.02 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 сентября 2019 г.
Аннотация:The production cross sections of B0s mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel B0s→μ+μ−K+K− at a centre-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 B0s meson in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The B0s 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 results are consistent with models of strangeness enhancement and a suppression as observed for the B+ mesons.