Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at √sNN = 2.76 TeV
ALICE Collaboration. (2016). Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at √sNN = 2.76 TeV. Physical Review C, 93(3), Article 034913. https://doi.org/10.1103/PhysRevC.93.034913
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2016Copyright
© 2016 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
Transverse momentum (pT) spectra of pions, kaons, and protons up to pT = 20 GeV/c have been measured
in Pb-Pb collisions at √sNN = 2.76 TeV using the ALICE detector for six different centrality classes covering
0%–80%. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT ≈ 3 GeV/c in central
Pb-Pb collisions that decreases for more peripheral collisions. For pT > 10 GeV/c, the nuclear modification factor
is found to be the same for all three particle species in each centrality interval within systematic uncertainties
of 10%–20%. This suggests there is no direct interplay between the energy loss in the medium and the particle
species composition in the hard core of the quenched jet. For pT < 10 GeV/c, the data provide important
constraints for models aimed at describing the transition from soft to hard physics.
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2469-9985Publication in research information system
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Except where otherwise noted, this item's license is described as © 2016 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
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