Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV

B. Abelev; J. Adam; D. Adamova; A.M. Adare; MM. Aggarwal; Ian Bearden; Hans Bøggild; Christian Holm Christensen; Jens Jørgen Gaardhøje; Hans Hjersing Dalsgaard; Kristjan Herlache Gulbrandsen; Alexander Colliander Hansen; Ante Bilandzic; Børge Svane Nielsen; Casper Nygaard; Carsten Søgaard

doi:10.1103/PhysRevC.88.044910

Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV

B. Abelev, J. Adam, D. Adamova, A.M. Adare, MM. Aggarwal, Ian Bearden, Hans Bøggild, Christian Holm Christensen, Jens Jørgen Gaardhøje, Hans Hjersing Dalsgaard, Kristjan Herlache Gulbrandsen, Alexander Colliander Hansen, Ante Bilandzic, Børge Svane Nielsen, Casper Nygaard, Carsten Søgaard

Experimental Particle Physics

430 Citations (Scopus)

Abstract

In this paper measurements are presented of π^±, K ^±, p, and p̄ production at midrapidity (|y|<0.5), in Pb-Pb collisions at √s_NN=2.76 TeV as a function of centrality. The measurement covers the transverse-momentum (p_T) 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 p_T 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 p_T 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.

Original language	English
Article number	044910
Journal	Physical Review C. Nuclear Physics
Volume	88
Issue number	4
ISSN	0556-2813
DOIs	https://doi.org/10.1103/PhysRevC.88.044910
Publication status	Published - 15 Oct 2013

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Abelev, B., Adam, J., Adamova, D., Adare, A. M., Aggarwal, MM., Bearden, I., Bøggild, H., Christensen, C. H., Gaardhøje, J. J., Dalsgaard, H. H., Gulbrandsen, K. H., Hansen, A. C., Bilandzic, A., Nielsen, B. S., Nygaard, C., & Søgaard, C. (2013). Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV. Physical Review C. Nuclear Physics, 88(4), [044910]. https://doi.org/10.1103/PhysRevC.88.044910

Abelev, B, Adam, J, Adamova, D, Adare, AM, Aggarwal, MM, Bearden, I , Bøggild, H , Christensen, CH , Gaardhøje, JJ, Dalsgaard, HH, Gulbrandsen, KH, Hansen, AC, Bilandzic, A, Nielsen, BS, Nygaard, C & Søgaard, C 2013, 'Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV', Physical Review C. Nuclear Physics, vol. 88, no. 4, 044910. https://doi.org/10.1103/PhysRevC.88.044910

@article{c1f706216e92497d951f6c7b47c9a35b,

title = "Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV",

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.",

author = "B. Abelev and J. Adam and D. Adamova and A.M. Adare and MM. Aggarwal and Ian Bearden and Hans B{\o}ggild and Christensen, {Christian Holm} and Gaardh{\o}je, {Jens J{\o}rgen} and Dalsgaard, {Hans Hjersing} and Gulbrandsen, {Kristjan Herlache} and Hansen, {Alexander Colliander} and Ante Bilandzic and Nielsen, {B{\o}rge Svane} and Casper Nygaard and Carsten S{\o}gaard",

year = "2013",

month = oct,

day = "15",

doi = "10.1103/PhysRevC.88.044910",

language = "English",

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TY - JOUR

T1 - Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV

AU - Abelev, B.

AU - Adam, J.

AU - Adamova, D.

AU - Adare, A.M.

AU - Aggarwal, MM.

AU - Bearden, Ian

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Gaardhøje, Jens Jørgen

AU - Dalsgaard, Hans Hjersing

AU - Gulbrandsen, Kristjan Herlache

AU - Hansen, Alexander Colliander

AU - Bilandzic, Ante

AU - Nielsen, Børge Svane

AU - Nygaard, Casper

AU - Søgaard, Carsten

PY - 2013/10/15

Y1 - 2013/10/15

N2 - In this paper measurements are presented of π±, K ±, p, and p̄ 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.

AB - In this paper measurements are presented of π±, K ±, p, and p̄ 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.

U2 - 10.1103/PhysRevC.88.044910

DO - 10.1103/PhysRevC.88.044910

M3 - Journal article

SN - 2469-9985

VL - 88

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044910

ER -

Centrality dependence of pi, K, and p production in Pb-Pb collisions at root s(NN)=2.76 TeV

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