Abstract

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.

Autore Pugliese

• Bruno Giuseppe Eugenio

Tutti gli autori

• Bruno G.E. , et al.

Titolo volume/Rivista

PHYSICAL REVIEW. C, NUCLEAR PHYSICS

Anno di pubblicazione

2013

ISSN

0556-2813

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

155

Ultimo Aggiornamento Citazioni

2017-04-22 03:20:59

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile