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

B. Abelev; J. Adam; D. Adamová; Ian Bearden; Ante Bilandzic; Hans Bøggild; Christian Holm Christensen; Hans Hjersing Dalsgaard; Jens Jørgen Gaardhøje; Kristjan Herlache Gulbrandsen; Alexander Colliander Hansen; Børge Svane Nielsen; Casper Nygaard; Carsten Søgaard; Valentina Zaccolo

doi:10.1016/j.physletb.2013.01.051

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

B. Abelev, J. Adam, D. Adamová, Ian Bearden, Ante Bilandzic, Hans Bøggild, Christian Holm Christensen, Hans Hjersing Dalsgaard, Jens Jørgen Gaardhøje, Kristjan Herlache Gulbrandsen, Alexander Colliander Hansen, Børge Svane Nielsen, Casper Nygaard, Carsten Søgaard, Valentina Zaccolo

Experimental Particle Physics

251 Citations (Scopus)

Abstract

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

Original language	English
Journal	Physics Letters B
Volume	720
Issue number	1-3
Pages (from-to)	52-62
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2013.01.051
Publication status	Published - 13 Mar 2013

Access to Document

10.1016/j.physletb.2013.01.051

Cite this

Abelev, B., Adam, J., Adamová, D., Bearden, I., Bilandzic, A., Bøggild, H., Christensen, C. H., Dalsgaard, H. H., Gaardhøje, J. J., Gulbrandsen, K. H., Hansen, A. C., Nielsen, B. S., Nygaard, C., Søgaard, C., & Zaccolo, V. (2013). Centrality dependence of charged particle production at large transverse momentum in Pb--Pb collisions at √sNN=2.76TeV. Physics Letters B, 720(1-3), 52-62. https://doi.org/10.1016/j.physletb.2013.01.051

Abelev, B, Adam, J, Adamová, D, Bearden, I, Bilandzic, A, Bøggild, H , Christensen, CH, Dalsgaard, HH, Gaardhøje, JJ , Gulbrandsen, KH, Hansen, AC, Nielsen, BS, Nygaard, C, Søgaard, C & Zaccolo, V 2013, 'Centrality dependence of charged particle production at large transverse momentum in Pb--Pb collisions at √sNN=2.76TeV', Physics Letters B, vol. 720, no. 1-3, pp. 52-62. https://doi.org/10.1016/j.physletb.2013.01.051

@article{f11d156e3c9f42dab28e4298770fd961,

title = "Centrality dependence of charged particle production at large transverse momentum in Pb--Pb collisions at √sNN=2.76TeV",

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 = "B. Abelev and J. Adam and D. Adamov{\'a} and Ian Bearden and Ante Bilandzic and Hans B{\o}ggild and Christensen, {Christian Holm} and Dalsgaard, {Hans Hjersing} and Gaardh{\o}je, {Jens J{\o}rgen} and Gulbrandsen, {Kristjan Herlache} and Hansen, {Alexander Colliander} and Nielsen, {B{\o}rge Svane} and Casper Nygaard and Carsten S{\o}gaard and Valentina Zaccolo",

year = "2013",

month = mar,

day = "13",

doi = "10.1016/j.physletb.2013.01.051",

language = "English",

volume = "720",

pages = "52--62",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

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=2.76TeV

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Bearden, Ian

AU - Bilandzic, Ante

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Dalsgaard, Hans Hjersing

AU - Gaardhøje, Jens Jørgen

AU - Gulbrandsen, Kristjan Herlache

AU - Hansen, Alexander Colliander

AU - Nielsen, Børge Svane

AU - Nygaard, Casper

AU - Søgaard, Carsten

AU - Zaccolo, Valentina

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.

U2 - 10.1016/j.physletb.2013.01.051

DO - 10.1016/j.physletb.2013.01.051

M3 - Journal article

SN - 0370-2693

VL - 720

SP - 52

EP - 62

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

IS - 1-3

ER -

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

Abstract

Access to Document

Fingerprint

Cite this