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Measurement of Bs0 meson production in pp and PbPb collisions at √sNN = 5.02 TeV

Author(s)
CMS collaboration; Abercrombie, Daniel Robert; Allen, B.; Azzolini, Virginia; Barbieri, Richard Alexander; Baty, Austin Alan; Bauer, Gerry P; Bi, R.; Brandt, S.; Busza, Wit; Cali, Ivan Amos; D'Alfonso, Mariarosaria; Demiragli, Zeynep; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Harris, Philip Coleman; Hsu, D.; Hu, M.; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Lee, Y. -J.; Levin, A.; Luckey Jr, P David; Maier, Benedikt; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, S.; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof; Roland, G.; Stephans, George S. F.; Sumorok, Konstanty C; Tatar, K.; velicanu, Dragos Alexandru; Wang, J; Wang, T.W.; Wyslouch, Boleslaw; Shi, Zhaozhong; ... Show more Show less
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Alternative title
Measurement of B[superscript 0 over subscript s] meson production in pp and PbPb collisions at √[superscript s]NN = 5.02 TeV
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Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/
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Abstract
The production cross sections of B[superscript 0 over subscript s] mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel B[superscript 0 over subscript s]→J/ψϕ→μ[superscript +]μ[superscript -]K[superscript K]K[superscript -] 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 B[superscript 0 over subscript s] mesons in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The B[superscript 0 over subscript s] 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.
Date issued
2019-09
URI
https://hdl.handle.net/1721.1/126736
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
CMS Collaboration (Sirunyan, A.M. et al.) "Measurement of Bs0 meson production in pp and PbPb collisions at √sNN = 5.02 TeV." Physics Letters B 796 (September 2019): 168-190. ©2019 Author(s)
Version: Final published version
ISSN
1873-2445

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