Measurement of B<i><sub>s</sub></i><SUP>0</SUP> meson production in pp and PbPb collisions at √<i>S</i><sub>NN</sub>=5.02 TeV



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Eroe, J, Del Valle, A Escalante
et al (show 2253 more authors) (2019) Measurement of B<i><sub>s</sub></i><SUP>0</SUP> meson production in pp and PbPb collisions at √<i>S</i><sub>NN</sub>=5.02 TeV. PHYSICS LETTERS B, 796. pp. 168-190.

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Abstract

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.

Item Type: Article
Uncontrolled Keywords: Physics, Quark gluon plasma, B meson, Open heavy-flavor
Depositing User: Symplectic Admin
Date Deposited: 05 Dec 2019 15:14
Last Modified: 14 Oct 2023 04:54
DOI: 10.1016/j.physletb.2019.07.014
Open Access URL: https://doi.org/10.1016/j.physletb.2019.07.014
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3064983