Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV

被引:0
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 ,200 ]
Ghete, V. M. [2 ]
Hartl, C. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ,200 ]
Koenig, A. [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 ,200 ]
Strauss, J. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ,200 ]
Dvornikov, O. [3 ]
Makarenko, V. [3 ]
Zykunov, V. [3 ]
Mossolov, V. [4 ]
Shumeiko, N. [4 ]
Gonzalez, J. Suarez [4 ]
Alderweireldt, S. [5 ]
De Wolf, E. A. [5 ]
Janssen, X. [5 ]
Lauwers, J. [5 ]
de Klundert, M. Van [5 ]
Van Haevermaet, H. [5 ]
Van Mechelen, P. [5 ]
Van Remortel, N. [5 ]
Van Spilbeeck, A. [5 ]
Abu Zeid, S. [6 ]
Blekman, F. [6 ]
D'Hondt, J. [6 ]
Daci, N. [6 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] Inst Hochenergiephys, Vienna, Austria
[3] Inst Nucl Problems, Minsk, BELARUS
[4] Natl Ctr Particle & High Energy Phys, 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] Univ Mons, Mons, Belgium
[11] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[12] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[13] Univ Estadual Paulista, Sao Paulo, Brazil
[14] Univ Fed ABC, Sao Paulo, Brazil
[15] Inst Nucl Energy Res, Sofia, Bulgaria
[16] Univ Sofia, Sofia, Bulgaria
[17] Beihang Univ, Beijing, Peoples R China
[18] Inst High Energy Phys, Beijing, Peoples R China
[19] Peking Univ, State Key Lab Nucl Phys & Technol, 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] Univ San Francisco Quito, Quito, Ecuador
[27] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
[28] NICPB, Tallinn, Estonia
[29] Univ Helsinki, Dept Phys, Helsinki, Finland
[30] Helsinki Inst Phys, Helsinki, Finland
[31] Lappeenranta Univ Technol, Lappeenranta, Finland
[32] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[33] CNRS, IN2P3, Ecole Polytech, Lab Leprince Ringuet, Palaiseau, France
[34] Univ Strasbourg, CNRS, IN2P3, Inst Pluridisciplinaire Hubert Curien,Univ Haute, Strasbourg, France
[35] Inst Natl Phys Nucl & Phys Particules, Ctr Calcul, CNRS, IN2P3, Villeurbanne, France
[36] Univ Claude Bernard Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, Villeurbanne, France
[37] Georgian Tech Univ, Tbilisi, Georgia
[38] Tbilisi State Univ, Tbilisi, Georgia
[39] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[40] Rhein Westfal TH Aachen, Phys Inst A3, Aachen, Germany
[41] Rhein Westfal TH Aachen, Phys Inst B3, Aachen, Germany
[42] DESY, Hamburg, Germany
[43] Univ Hamburg, Hamburg, Germany
[44] Inst Expt Kernphys, Karlsruhe, Germany
[45] Inst Nucl & Particle Phys, NCSR Demokritos, Aghia Paraskevi, Greece
[46] Univ Athens, Athens, Greece
[47] Univ Ioannina, Ioannina, Greece
[48] Eotvos Lorand Univ, MTA ELTE Lendulet CMS Particle & Nucl Phys Grp, Budapest, Hungary
[49] Wigner Res Ctr Phys, Budapest, Hungary
[50] Inst Nucl Res ATOMKI, Debrecen, Hungary
基金
美国国家科学基金会; 欧洲研究理事会; 芬兰科学院; 巴西圣保罗研究基金会;
关键词
Heavy Ion Experiments; Quark Gluon Plasma; Relativistic heavy ion physics; QUARK-GLUON PLASMA; TRANSVERSE-MOMENTUM; DEPENDENCE; ENERGY; PERSPECTIVE; SPECTRA;
D O I
10.1007/JHEP04(2017)039
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The spectra of charged particles produced within the pseudorapidity window vertical bar eta vertical bar < 1 at root s(NN) = 5 : 02 TeV are measured using 404 mu b(-1) of PbPb and 27.4 pb(-1) of pp data collected by the CMS detector at the LHC in 2015. The spectra are presented over the transverse momentum ranges spanning 0 : 5 < p(T) < 400 GeV in pp and 0 : 7 < p(T) < 400 GeV in PbPb collisions. The corresponding nuclear modification factor, R-AA, is measured in bins of collision centrality. The R-AA in the 5% most central collisions shows a maximal suppression by a factor of 7-8 in the p(T) region of 6-9 GeV. This dip is followed by an increase, which continues up to the highest p(T) measured, and approaches unity in the vicinity of p(T) = 200 GeV. The R-AA is compared to theoretical predictions and earlier experimental results at lower collision energies. The newly measured pp spectrum is combined with the pPb spectrum previously published by the CMS collaboration to construct the pPb nuclear modification factor, R-pA, up to 120 GeV. For p(T) > 20 GeV, R-pA exhibits weak momentum dependence and shows a moderate enhancement above unity.
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页数:45
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