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

Acharya, S.
•
Acosta, F. T.
•
Adamová, D.
altro
Zou, S.
2018
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
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 = 5.02TeV 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.
DOI
10.1007/JHEP11(2018)013
WOS
WOS:000449806100001
Archivio
http://hdl.handle.net/11368/2931330
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85056258196
https://link.springer.com/article/10.1007%2FJHEP11%282018%29013
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2931330/1/JHEP11(2018)013_1-32.pdf
Soggetti
  • Heavy Ion Experiment

  • Heavy-ion collision

  • Nuclear and High Ener...

Scopus© citazioni
91
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
120
Data di acquisizione
Mar 28, 2024
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