Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at root s(NN)=2.76 TeV

K. Aamodt...[et al.]; Ian Bearden; Hans Bøggild; Christian Holm Christensen; Hans Hjersing Dalsgaard; Jens Jørgen Gaardhøje; Kristjan Herlache Gulbrandsen; Børge Svane Nielsen; Carsten Søgaard

doi:10.1016/j.physletb.2010.12.020

Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at root s(NN)=2.76 TeV

K. Aamodt...[et al.], Ian Bearden, Hans Bøggild, Christian Holm Christensen, Hans Hjersing Dalsgaard, Jens Jørgen Gaardhøje, Kristjan Herlache Gulbrandsen, Børge Svane Nielsen, Carsten Søgaard

458 Citations (Scopus)

Abstract

Inclusive transverse momentum spectra of primary charged particles in Pb-Pb collisions at sNN=2.76 TeV have been measured by the ALICE Collaboration at the LHC. The data are presented for central and peripheral collisions, corresponding to 0-5% and 70-80% of the hadronic Pb-Pb cross section. The measured charged particle spectra in |n|<0.8 and 0.3<pT<20 GeV/c are compared to the expectation in pp collisions at the same sNN, scaled by the number of underlying nucleon-nucleon collisions. The comparison is expressed in terms of the nuclear modification factor RAA. The result indicates only weak medium effects (RAA≈0.7) in peripheral collisions. In central collisions, RAA reaches a minimum of about 0.14 at pT=6-7 GeV/c and increases significantly at larger pT. The measured suppression of high- pT particles is stronger than that observed at lower collision energies, indicating that a very dense medium is formed in central Pb-Pb collisions at the LHC.

Original language	English
Journal	Physics Letters B
Volume	696
Issue number	1-2
Pages (from-to)	30-39
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2010.12.020
Publication status	Published - 24 Jan 2011

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Aamodt...[et al.], K., Bearden, I., Bøggild, H., Christensen, C. H., Dalsgaard, H. H., Gaardhøje, J. J., Gulbrandsen, K. H., Nielsen, B. S., & Søgaard, C. (2011). Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at root s(NN)=2.76 TeV. Physics Letters B, 696(1-2), 30-39. https://doi.org/10.1016/j.physletb.2010.12.020

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title = "Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at root s(NN)=2.76 TeV",

abstract = "Inclusive transverse momentum spectra of primary charged particles in Pb-Pb collisions at sNN=2.76 TeV have been measured by the ALICE Collaboration at the LHC. The data are presented for central and peripheral collisions, corresponding to 0-5% and 70-80% of the hadronic Pb-Pb cross section. The measured charged particle spectra in |n|<0.8 and 0.3",

author = "{Aamodt...[et al.]}, K. and Ian Bearden 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 Nielsen, {B{\o}rge Svane} and Carsten S{\o}gaard",

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doi = "10.1016/j.physletb.2010.12.020",

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AU - Aamodt...[et al.], K.

AU - Bearden, Ian

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Dalsgaard, Hans Hjersing

AU - Gaardhøje, Jens Jørgen

AU - Gulbrandsen, Kristjan Herlache

AU - Nielsen, Børge Svane

AU - Søgaard, Carsten

PY - 2011/1/24

Y1 - 2011/1/24

N2 - Inclusive transverse momentum spectra of primary charged particles in Pb-Pb collisions at sNN=2.76 TeV have been measured by the ALICE Collaboration at the LHC. The data are presented for central and peripheral collisions, corresponding to 0-5% and 70-80% of the hadronic Pb-Pb cross section. The measured charged particle spectra in |n|<0.8 and 0.3

AB - Inclusive transverse momentum spectra of primary charged particles in Pb-Pb collisions at sNN=2.76 TeV have been measured by the ALICE Collaboration at the LHC. The data are presented for central and peripheral collisions, corresponding to 0-5% and 70-80% of the hadronic Pb-Pb cross section. The measured charged particle spectra in |n|<0.8 and 0.3

U2 - 10.1016/j.physletb.2010.12.020

DO - 10.1016/j.physletb.2010.12.020

M3 - Journal article

SN - 0370-2693

VL - 696

SP - 30

EP - 39

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at root s(NN)=2.76 TeV

Abstract

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