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Centrality dependence of π, K, and p production in Pb-Pb collisions at sNN−−−−√=2.76 TeV (CROSBI ID 199954)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Abedev, B. ; ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... et al. Centrality dependence of π, K, and p production in Pb-Pb collisions at sNN−−−−√=2.76 TeV // Physical review. C, Nuclear physics, 88 (2013), 4; 044910-1-044910-23. doi: 10.1103/PhysRevC.88.044910

Podaci o odgovornosti

Abedev, B. ; ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Šuša, Tatjana ; ... ; Vicković, Linda ; ... ; Zyzak, M.

engleski

Centrality dependence of π, K, and p production in Pb-Pb collisions at sNN−−−−√=2.76 TeV

In this paper measurements are presented of π±, K±, p, and p¯ production at midrapidity (|y|<0.5), in Pb-Pb collisions at sNN−−−√=2.76 TeV as a function of centrality. The measurement covers the transverse-momentum (pT) range from 100, 200, and 300 MeV/c up to 3, 3, and 4.6 GeV/c for π, 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.

centrality; Pb-Pb; π; K; proton; heavy ion; ALICE

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Podaci o izdanju

88 (4)

2013.

044910-1-044910-23

objavljeno

0556-2813

10.1103/PhysRevC.88.044910

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Fizika

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