Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC

被引:49
作者
Khachatryan, V. [1 ]
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Asilar, E. [2 ]
Bergauer, T. [2 ]
Brandstetter, J. [2 ]
Brondolin, E. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Flechl, M. [2 ]
Friedl, M. [2 ]
Fruehwirth, R. [2 ]
Ghete, V. M. [2 ]
Hartl, C. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ]
Koenig, A. [2 ]
Krammer, M. [2 ]
Kraetschmer, I. [2 ]
Liko, D. [2 ]
Matsushita, T. [2 ]
Mikulec, I. [2 ]
Rabady, D. [2 ]
Rad, N. [2 ]
Rahbaran, B. [2 ]
Rohringer, H. [2 ]
Schieck, J. [2 ]
Strauss, J. [2 ]
Treberer-Treberspurg, W. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ]
Mossolov, V. [3 ]
Shumeiko, N. [3 ]
Gonzalez, J. Suarez [3 ]
Alderweireldt, S. [4 ]
Cornelis, T. [4 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Knutsson, A. [4 ]
Lauwers, J. [4 ]
Luyckx, S. [4 ]
Van De Klundert, M. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
Van Spilbeeck, A. [4 ]
Abu Zeid, S. [5 ]
Blekman, F. [5 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] Inst Hochenergiephys OeAW, Vienna, Austria
[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS
[4] Univ Antwerp, Antwerp, Belgium
[5] Vrije Univ Brussel, Brussels, Belgium
[6] Univ Libre Bruxelles, Brussels, Belgium
[7] Univ Ghent, Ghent, Belgium
[8] Catholic Univ Louvain, Louvain, Belgium
[9] Univ Mons, Mons, Belgium
[10] Ctr Brasileiro Pesquisas Fisicas, 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] Inst Nucl Energy Res, 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] Univ Los Andes, Bogota, Colombia
[20] Univ Split, Fac Elect Engn, Mech Engn & Naval Architecture, Split, Croatia
[21] Univ Split, Fac Sci, Split, Croatia
[22] Inst Rudjer Boskov, Zagreb, Croatia
[23] Univ Cyprus, Nicosia, Cyprus
[24] Charles Univ Prague, Prague, Czech Republic
[25] Univ San Francisco de Quito, Quito, Ecuador
[26] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
[27] NICPB, Tallinn, Estonia
[28] Univ Helsinki, Dept Phys, Helsinki, Finland
[29] Helsinki Inst Phys, Helsinki, Finland
[30] Lappeenranta Univ Technol, Lappeenranta, Finland
[31] CEA Saclay, DSM IRFU, Gif Sur Yvette, France
[32] IN2P3 CNRS, Ecole Polytech, Lab Leprince Ringuet, Palaiseau, France
[33] Univ Haute Alsace Mulhouse, Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS IN2P3, Strasbourg, France
[34] Ctr Calcul, Inst Natl Phys Nucl & Phys Particules, CNRS IN2P3, Villeurbanne, France
[35] Univ Lyon 1, CNRS IN2P3, Inst Phys Nucl Lyon, Villeurbanne, France
[36] Georgian Tech Univ, Tbilisi, Georgia
[37] Tbilisi State Univ, Tbilisi, Georgia
[38] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[39] Rhein Westfal TH Aachen, Phys Inst 3 A, Aachen, Germany
[40] Rhein Westfal TH Aachen, Phys Inst 3 B, Aachen, Germany
[41] Deutsch Elekt Synchrotron, Hamburg, Germany
[42] Univ Hamburg, Hamburg, Germany
[43] Inst Expt Kernphys, Karlsruhe, Germany
[44] NCSR Demokritos, INPP, Aghia Paraskevi, Greece
[45] Natl & Kapodistrian Univ Athens, Athens, Greece
[46] Univ Ioannina, Ioannina, Greece
[47] Eotvos Lorand Univ, MTA ELTE Lendulet CMS Particle & Nucl Phys Grp, Budapest, Hungary
[48] Wigner Res Ctr Phys, Budapest, Hungary
[49] Inst Nucl Res ATOMKI, Debrecen, Hungary
[50] Univ Debrecen, Debrecen, Hungary
基金
欧洲研究理事会; 美国国家科学基金会; 巴西圣保罗研究基金会; 芬兰科学院;
关键词
CMS; Physics; Heavy ion; Spectra; Radial flow; TRANSVERSE-MOMENTUM; ENHANCEMENT; PARTON;
D O I
10.1016/j.physletb.2017.01.075
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Measurements of strange hadron (K-S(0), Lambda +(Lambda) over bar, and Xi(-)+(Xi) over bar (+)) transverse momentum spectra in pp, pPb, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pp collisions at root s= 7 TeV, pPb collisions at root(NN)-N-s= 5.02 TeV, and PbPb collisions at root(NN)-N-s = 2.76 TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between different particle species is observed to be larger for pp and pPb events than for PbPb events. In pPb collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. The spectra are compared to models motivated by hydrodynamics. (c) 2017 The Author(s). Published by Elsevier B.V.
引用
收藏
页码:103 / 129
页数:27
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