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Title: Measurement of B$$^0_\mathrm{s}$$ meson production in pp and PbPb collisions at $$\sqrt{s_\mathrm{NN}} =$$ 5.02 TeV

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.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS
OSTI Identifier:
1564368
Alternate Identifier(s):
OSTI ID: 1480107
Report Number(s):
FERMILAB-PUB-18-566-CMS; arXiv:1810.03022; CMS-HIN-17-008; CERN-EP-2018-257
1697571
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Phys.Lett.
Additional Journal Information:
Journal Volume: B796
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Sirunyan, Albert M, and et al. Measurement of B$^0_\mathrm{s}$ meson production in pp and PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV. United States: N. p., 2019. Web. doi:10.1016/j.physletb.2019.07.014.
Sirunyan, Albert M, & et al. Measurement of B$^0_\mathrm{s}$ meson production in pp and PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV. United States. doi:10.1016/j.physletb.2019.07.014.
Sirunyan, Albert M, and et al. Tue . "Measurement of B$^0_\mathrm{s}$ meson production in pp and PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV". United States. doi:10.1016/j.physletb.2019.07.014.
@article{osti_1564368,
title = {Measurement of B$^0_\mathrm{s}$ meson production in pp and PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV},
author = {Sirunyan, Albert M and et al.},
abstractNote = {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.},
doi = {10.1016/j.physletb.2019.07.014},
journal = {Phys.Lett.},
number = ,
volume = B796,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2019.07.014

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