Skip to Main content Skip to Navigation
Journal articles

Centrality dependence of Pi, K, p production in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

Abstract : In this paper measurements are presented of Pi+, Pi-, K+, K-, p and antiproton production at mid-rapidity < 0.5, in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV as a function of centrality. The measurement covers the transverse momentum pt range from 100, 200, 300 MeV/c up to 3, 3, 4.6 GeV/c, for Pi, K, and p respectively. The measured pt distributions and yields are compared to expectations based on hydrodynamic, thermal and recombination models. The spectral shapes of central collisions show a stronger radial flow than measured at lower energies, which can be described in hydrodynamic models. In peripheral collisions, the pt distributions are not well reproduced by hydrodynamic models. Ratios of integrated particle yields are found to be nearly independent of centrality. The yield of protons normalized to pions is a factor ~1.5 lower than the expectation from thermal models.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00796747
Contributor : Sylvie Flores <>
Submitted on : Tuesday, March 5, 2013 - 7:44:18 AM
Last modification on : Thursday, November 19, 2020 - 12:59:02 PM

Links full text

Identifiers

Citation

B. Abelev, Laurent Aphecetche, A. Baldisseri, Guillaume Batigne, I. Belikov, et al.. Centrality dependence of Pi, K, p production in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV. Physical Review C, American Physical Society, 2013, 88, pp.044910. ⟨10.1103/PhysRevC.88.044910⟩. ⟨in2p3-00796747⟩

Share

Metrics

Record views

659