Centrality dependence of charged particle production at large transverse momentum in Pb–Pb collisions at √sNN=2.76 TeV

ALICE Collaboration

Research output: Contribution to journalArticle

218 Citations (Scopus)

Abstract

The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb–Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15<pT<50 GeV/c for nine centrality intervals from 70–80% to 0–5%. The results in Pb–Pb are presented in terms of the nuclear modification factor RAA using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-pT particles strongly depends on event centrality. The yield is most suppressed in central collisions (0–5%) with RAA≈0.13 at pT=6–7 GeV/c. Above pT=7 GeV/c, there is a significant rise in the nuclear modification factor, which reaches RAA≈0.4 for pT>30 GeV/c. In peripheral collisions (70–80%), only moderate suppression (RAA=0.6–0.7) and a weak pT dependence is observed. The measured nuclear modification factors are compared to other measurements and model calculations.

Original languageEnglish
Pages (from-to)52-62
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume720
Issue number1-3
DOIs
Publication statusPublished - 2013 Mar 13

Fingerprint

particle production
transverse momentum
charged particles
retarding
collisions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

@article{30ce0ad1e2164b2794d871730ec396b6,
title = "Centrality dependence of charged particle production at large transverse momentum in Pb–Pb collisions at √sNN=2.76 TeV",
abstract = "The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb–Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15T<50 GeV/c for nine centrality intervals from 70–80{\%} to 0–5{\%}. The results in Pb–Pb are presented in terms of the nuclear modification factor RAA using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-pT particles strongly depends on event centrality. The yield is most suppressed in central collisions (0–5{\%}) with RAA≈0.13 at pT=6–7 GeV/c. Above pT=7 GeV/c, there is a significant rise in the nuclear modification factor, which reaches RAA≈0.4 for pT>30 GeV/c. In peripheral collisions (70–80{\%}), only moderate suppression (RAA=0.6–0.7) and a weak pT dependence is observed. The measured nuclear modification factors are compared to other measurements and model calculations.",
author = "{ALICE Collaboration} and B. Abelev and J. Adam and D. Adamov{\'a} and Adare, {A. M.} and Aggarwal, {M. M.} and {Aglieri Rinella}, G. and Agocs, {A. G.} and A. Agostinelli and {Aguilar Salazar}, S. and Z. Ahammed and N. Ahmad and {Ahmad Masoodi}, A. and Ahn, {S. A.} and Ahn, {S. U.} and A. Akindinov and D. Aleksandrov and B. Alessandro and {Alfaro Molina}, R. and A. Alici and A. Alkin and {Almar{\'a}z Avi{\~n}a}, E. and J. Alme and T. Alt and V. Altini and S. Altinpinar and I. Altsybeev and C. Andrei and A. Andronic and V. Anguelov and J. Anielski and C. Anson and T. Antičić and F. Antinori and P. Antonioli and L. Aphecetche and H. Appelsh{\"a}user and N. Arbor and S. Arcelli and A. Arend and N. Armesto and R. Arnaldi and T. Aronsson and Arsene, {I. C.} and M. Arslandok and A. Asryan and A. Augustinus and R. Averbeck and Awes, {T. C.} and J. {\"A}yst{\"o} and Azmi, {M. D.}",
year = "2013",
month = "3",
day = "13",
doi = "10.1016/j.physletb.2013.01.051",
language = "English",
volume = "720",
pages = "52--62",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Centrality dependence of charged particle production at large transverse momentum in Pb–Pb collisions at √sNN=2.76 TeV

AU - ALICE Collaboration

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Adare, A. M.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agocs, A. G.

AU - Agostinelli, A.

AU - Aguilar Salazar, S.

AU - Ahammed, Z.

AU - Ahmad, N.

AU - Ahmad Masoodi, A.

AU - Ahn, S. A.

AU - Ahn, S. U.

AU - Akindinov, A.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Alici, A.

AU - Alkin, A.

AU - Almaráz Aviña, E.

AU - Alme, J.

AU - Alt, T.

AU - Altini, V.

AU - Altinpinar, S.

AU - Altsybeev, I.

AU - Andrei, C.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anielski, J.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arbor, N.

AU - Arcelli, S.

AU - Arend, A.

AU - Armesto, N.

AU - Arnaldi, R.

AU - Aronsson, T.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Asryan, A.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Awes, T. C.

AU - Äystö, J.

AU - Azmi, M. D.

PY - 2013/3/13

Y1 - 2013/3/13

N2 - The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb–Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15T<50 GeV/c for nine centrality intervals from 70–80% to 0–5%. The results in Pb–Pb are presented in terms of the nuclear modification factor RAA using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-pT particles strongly depends on event centrality. The yield is most suppressed in central collisions (0–5%) with RAA≈0.13 at pT=6–7 GeV/c. Above pT=7 GeV/c, there is a significant rise in the nuclear modification factor, which reaches RAA≈0.4 for pT>30 GeV/c. In peripheral collisions (70–80%), only moderate suppression (RAA=0.6–0.7) and a weak pT dependence is observed. The measured nuclear modification factors are compared to other measurements and model calculations.

AB - The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb–Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15T<50 GeV/c for nine centrality intervals from 70–80% to 0–5%. The results in Pb–Pb are presented in terms of the nuclear modification factor RAA using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-pT particles strongly depends on event centrality. The yield is most suppressed in central collisions (0–5%) with RAA≈0.13 at pT=6–7 GeV/c. Above pT=7 GeV/c, there is a significant rise in the nuclear modification factor, which reaches RAA≈0.4 for pT>30 GeV/c. In peripheral collisions (70–80%), only moderate suppression (RAA=0.6–0.7) and a weak pT dependence is observed. The measured nuclear modification factors are compared to other measurements and model calculations.

UR - http://www.scopus.com/inward/record.url?scp=85040604787&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040604787&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2013.01.051

DO - 10.1016/j.physletb.2013.01.051

M3 - Article

AN - SCOPUS:85040604787

VL - 720

SP - 52

EP - 62

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-3

ER -