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공공누리This item is licensed Korea Open Government License

Title
Centrality dependence of π, K, p production in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV
Author(s)
ALICECollaboration안상언안설아장행진
Publication Year
2013-10-15
Abstract
In this paper measurements are presented of π±, K±, p, and p̅ production at midrapidity (y less than 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.
Keyword
Centrality dependence; π; K; pproduction; Pb-Pbcollision; sqrt(sNN)=2.76TeV
Journal Title
Physical Review C
ISSN
0556-2813
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14213
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