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
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 author||F.T. Acosta, J. Adolfsson, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. A.....|
|Journal series||Journal of High Energy Physics, ISSN 1029-8479 [1126-6708], (A 40 pkt)|
|Score|| = 40.0, 20-11-2018, ArticleFromJournal|
= 40.0, 20-11-2018, ArticleFromJournal
|Publication indicators||= 0; : 2017 = 1.083; : 2017 = 5.541 (2) - 2017=4.807 (5)|
|Citation count*||21 (2019-01-03)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.