Abstract
Transverse momentum spectra of pions, kaons, and protons up to have been measured in Pb-Pb collisions at 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 in central Pb-Pb collisions that decreases for more peripheral collisions. For , 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 , the data provide important constraints for models aimed at describing the transition from soft to hard physics.
21 More- Received 7 July 2015
- Revised 9 November 2015
DOI:https://doi.org/10.1103/PhysRevC.93.034913
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©2016 CERN, for the ALICE Collaboration