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

被引:25
作者
Sirunyan, A. M. [2 ]
Tumasyan, A. [2 ]
Adam, W. [3 ]
Ambrogi, F. [3 ]
Asilar, E. [3 ]
Bergauer, T. [3 ]
Brandstetter, J. [3 ]
Dragicevic, M. [3 ]
Eroe, J. [3 ]
Del Valle, A. Escalante [3 ]
Flechl, M. [3 ]
Fruehwirth, R. [3 ,205 ]
Ghete, V. M. [3 ]
Hrubec, J. [3 ]
Jeitler, M. [3 ,205 ]
Krammer, N. [3 ]
Kraetschmer, I [3 ]
Liko, D. [3 ]
Madlener, T. [3 ]
Mikulec, I [3 ]
Rad, N. [3 ]
Rohringer, H. [3 ]
Schieck, J. [3 ,205 ]
Schoefbeck, R. [3 ]
Spanring, M. [3 ]
Spitzbart, D. [3 ]
Taurok, A. [3 ]
Waltenberger, W. [3 ]
Wittmann, J. [3 ]
Wulz, C-E [3 ,205 ]
Zarucki, M. [3 ]
Chekhovsky, V [4 ]
Mossolov, V [4 ]
Gonzalez, J. Suarez [4 ]
De Wolf, E. A. [5 ]
Di Croce, D. [5 ]
Janssen, X. [5 ]
Lauwers, J. [5 ]
Pieters, M. [5 ]
Van Haevermaet, H. [5 ]
Van Mechelen, P. [5 ]
Van Remortel, N. [5 ]
Abu Zeid, S. [6 ]
Blekman, F. [6 ]
D'Hondt, J. [6 ]
De Clercq, J. [6 ]
Deroover, K. [6 ]
Flouris, G. [6 ]
Lontkovskyi, D. [6 ]
Lowette, S. [6 ]
机构
[1] CERN, Geneva, Switzerland
[2] Yerevan Phys Inst, Yerevan, Armenia
[3] Inst Hochenergiephys, Vienna, Austria
[4] Inst Nucl Problems, Minsk, BELARUS
[5] Univ Antwerp, Antwerp, Belgium
[6] Vrije Univ Brussel, Brussels, Belgium
[7] Univ Libre Bruxelles, Brussels, Belgium
[8] Univ Ghent, Ghent, Belgium
[9] Catholic Univ Louvain, Louvain La Neuve, Belgium
[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[11] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[12] Univ Estadual Paulista, Sao Paulo, Brazil
[13] Univ Fed ABC, Sao Paulo, Brazil
[14] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[15] Univ Sofia, Sofia, Bulgaria
[16] Beihang Univ, Beijing, Peoples R China
[17] Inst High Energy Phys, Beijing, Peoples R China
[18] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China
[19] Tsinghua Univ, Beijing, Peoples R China
[20] Univ Los Andes, Bogota, Colombia
[21] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[22] Univ Split, Fac Sci, Split, Croatia
[23] Inst Rudjer Boskovic, Zagreb, Croatia
[24] Univ Cyprus, Nicosia, Cyprus
[25] Charles Univ Prague, Prague, Czech Republic
[26] Escuela Politec Nacl, Quito, Ecuador
[27] Univ San Francisco Quito, Quito, Ecuador
[28] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt
[29] NICPB, Tallinn, Estonia
[30] Univ Helsinki, Dept Phys, Helsinki, Finland
[31] Helsinki Inst Phys, Helsinki, Finland
[32] Lappeenranta Univ Technol, Lappeenranta, Finland
[33] Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France
[34] Univ Paris Saclay, Ecole Polytech, Lab Leprince Ringuet, CNRS,IN2P3, Palaiseau, France
[35] Univ Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
[36] CNRS, Ctr Calcul, Inst Natl Phys Nucl & Phys Particules, IN2P3, Villeurbanne, France
[37] Univ Claude Bernard Lyon 1, Univ Lyon, CNRS, IN2P3,Inst Phys Nucl Lyon, Villeurbanne, France
[38] Georgian Tech Univ, Tbilisi, Georgia
[39] Tbilisi State Univ, Tbilisi, Georgia
[40] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[41] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[42] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[43] DESY, Hamburg, Germany
[44] Univ Hamburg, Hamburg, Germany
[45] Karlsruher Inst Technol, Karlsruhe, Germany
[46] NCSR Demokritos, INPP, Aghia Paraskevi, Greece
[47] Natl & Kapodistrian Univ Athens, Athens, Greece
[48] Natl Tech Univ Athens, Athens, Greece
[49] Univ Ioannina, Ioannina, Greece
[50] Eotvos Lorand Univ, MTA ELTE Lendulet CMS Particle & Nucl Phys Grp, Budapest, Hungary
基金
芬兰科学院; 巴西圣保罗研究基金会; 欧盟地平线“2020”; 欧洲研究理事会;
关键词
Physics; Quark gluon plasma; B meson; Open heavy-flavor; ENERGY; DEPENDENCE; KAON;
D O I
10.1016/j.physletb.2019.07.014
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The production cross sections of B-s(0) mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel B-s(0)-> J/ psi phi ->mu(+) mu(-) K+K- at a center-of-mass energy of 5.02 TeV per nucleon pair and within the rapidity range vertical bar y vertical bar < 2.4 using the CMS detector at the LHC. The pp measurement is performed as a function of transverse momentum (P-T) of the B-s(0), mesons in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The B s production yield in PbPb collisions is measured in two F t 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 (R-AA) is found to be 1.5 +/- 0.6(stat) +/- 0.5(syst) for 7-15 GeV/c, and 0.87 +/- 0.30(stat) +/- 0.1 7(syst) for 15-50 GeV/c, respectively. Within current uncertainties, the B-s(0) results are consistent with models of strangeness enhancement, and suppression by parton energy loss, as observed for the B+ mesons. Published by Elsevier B.V.
引用
收藏
页码:168 / 190
页数:23
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