Measurement of B0s Meson Production in pp and PbPb Collisions at √sNN = 5.02 TeV

Physics Letters B 2019
Viesturs Veckalns, et al 100

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.

Keywords
B meson, Open heavy-flavor, Physics, Quark gluon plasma
DOI
10.1016/j.physletb.2019.07.014
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0370269319304708?via%3Dihub

Veckalns, V., 100, e. Measurement of B0s Meson Production in pp and PbPb Collisions at √sNN = 5.02 TeV. Physics Letters B, 2019, Vol. 100, No. 100, pp.168-190. ISSN 0370-2693. Available from: doi:10.1016/j.physletb.2019.07.014

Publication language
English (en)