https://scholars.lib.ntu.edu.tw/handle/123456789/574814
標題: | Measurement of Bs 0 meson production in pp and PbPb collisions at sNN=5.02 TeV | 作者: | Sirunyan A.M. et al. Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Ghete, V.M. Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Rohringer, H. Schieck, J. Schöfbeck, R. Spanring, M. Spitzbart, D. Taurok, A. Waltenberger, W. Wittmann, J. Wulz, C.-E. PAO-TI CHANG KAI-FENG CHEN WEI-SHU HOU RONG-SHYANG LU Stathes Paganis |
公開日期: | 2019 | 卷: | 796 | 起(迄)頁: | 168-190 | 來源出版物: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | 摘要: | The production cross sections of Bs 0 mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel Bs 0→J/ψ?→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 Bs 0 mesons in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The Bs 0 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 Bs 0 results are consistent with models of strangeness enhancement, and suppression by parton energy loss, as observed for the B+ mesons. ? 2019 |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069690722&doi=10.1016%2fj.physletb.2019.07.014&partnerID=40&md5=bf28a49e7ab2834afbe753f94df1cd1c https://scholars.lib.ntu.edu.tw/handle/123456789/574814 |
ISSN: | 3702693 | DOI: | 10.1016/j.physletb.2019.07.014 |
顯示於: | 物理學系 |
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