Transverse momentum spectra and nuclear modification factors of charged particles in pp, p-Pb and Pb-Pb collisions at the LHC

S. Acharya , D Adamova , Radosław Bala , M. Bonora , Alberto Castro , Sunwoong Cho , P. Ghosh , P. Giubilato , Łukasz Graczykowski , F. Herrmann , Ch Hughes , Dirk Hutter , Vitalii Ivanov , P. A. Jacobs , Monika Jakubowska , Małgorzata Janik , Evan P.C Jones , Przemysław Karczmarczyk , Jung-wook Kim , Jung-wook Kim , Adam Kisiel , SS. Kumar , José Carlos Lara Gómez , A. Lattuca , N. Martin , Mònica Martinez , Julian Myrcha , Jeremi Niedziela , Janusz Oleniacz , Jakub Siemek, Prof. dr hab. inż. czł. PAN , Jan Pluta , Marta Janczuk-Richter , Przemysław Rokita , Krystian Rosłon , Md. Shahjahan K. A. Sarkar , Krzysztof Sielewicz , J. Song , F Sozzi , S. Tripathy , Tomasz Trzciński , Barbara Trzeciak , Chien-Ming Wang , Jaap Wessels , Michael D. Williams , Chek P Yang , Z. Yin , Ammar Zaman , Hanna Zbroszczyk , Jiang Zhu

Abstract

We report the measured transverse momentum (pT) spectra of primary charged particles from pp, p-Pb and Pb-Pb collisions at a center-of-mass energy sNN=5.02 TeV in the kinematic range of 0.15 < pT< 50 GeV/c and |η| < 0.8. A significant improvement of systematic uncertainties motivated the reanalysis of data in pp and Pb-Pb collisions at sNN=2.76 TeV, as well as in p-Pb collisions at sNN=5.02 TeV, which is also presented. Spectra from Pb-Pb collisions are presented in nine centrality intervals and are compared to a reference spectrum from pp collisions scaled by the number of binary nucleon-nucleon collisions. For central collisions, the pT spectra are suppressed by more than a factor of 7 around 6–7 GeV/c with a significant reduction in suppression towards higher momenta up to 30 GeV/c. The nuclear modification factor RpPb, constructed from the pp and p-Pb spectra measured at the same collision energy, is consistent with unity above 8 GeV/c. While the spectra in both pp and Pb-Pb collisions are substantially harder at sNN=5.02 TeV compared to 2.76 TeV, the nuclear modification factors show no significant collision energy dependence. The obtained results should provide further constraints on the parton energy loss calculations to determine the transport properties of the hot and dense QCD matter.[Figure not available: see fulltext.].

Collective authorF.T. Acosta, J. Adolfsson, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. A.....
Author S. Acharya - [Variable Energy Cyclotron Centre India]
S. Acharya,,
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, D Adamova - [Academy of Sciences of the Czech Republic]
D Adamova,,
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, Radosław Bala
Radosław Bala,,
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, M. Bonora - [European Organization for Nuclear Research (CERN)]
M. Bonora,,
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- European Organization for Nuclear Research
, Alberto Castro - [University of Tennessee, Knoxville]
Alberto Castro,,
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, Sunwoong Cho - [Inha University, Incheon]
Sunwoong Cho,,
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, P. Ghosh - [Variable Energy Cyclotron Centre India]
P. Ghosh,,
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, P. Giubilato - [Istituto Nazionale Di Fisica Nucleare, Sezione di Padova]
P. Giubilato,,
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, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, F. Herrmann - [Westfalische Wilhelms-Universitat Munster]
F. Herrmann,,
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et al.`
Journal seriesJournal of High Energy Physics, ISSN 1029-8479, [1126-6708], (A 40 pkt)
Issue year2018
Vol2018
Pages1-32
Publication size in sheets1.55
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1007/JHEP11(2018)013
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 19-11-2019, ArticleFromJournal
Publication indicators Scopus Citations = 15; WoS Citations = 8; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.132; WoS Impact Factor: 2018 = 5.833 (2) - 2018=4.911 (5)
Citation count*92 (2019-12-03)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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