Skip to Main content Skip to Navigation
Journal articles

Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV

Abstract : Transverse momentum ($p_{\rm{T}}$) spectra of pions, kaons, and protons up to $p_{\rm{T}} = 20$ GeV/$c$ have been measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ 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 $p_{\rm{T}} \approx 3$ GeV/$c$ in central Pb-Pb collisions that decreases towards more peripheral collisions. For $p_{\rm{T}} > 10$ 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 $p_{\rm{T}} < 10$ GeV/$c$, the data provide important constraints for models aimed at describing the transition from soft to hard physics.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-01172195
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, July 7, 2015 - 9:40:05 AM
Last modification on : Thursday, November 19, 2020 - 1:01:38 PM

Links full text

Identifiers

Citation

J. Adam, G. Conesa Balbastre, J. Faivre, C. Furget, R. Guernane, et al.. Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV. Physical Review C, American Physical Society, 2016, 93, pp.034913. ⟨10.1103/PhysRevC.93.034913⟩. ⟨in2p3-01172195⟩

Share

Metrics

Record views

618