Study of high-p T charged particle suppression in PbPb compared to pp collisions at √S NN=2.76 TeV

Study of high-p T charged particle suppression in PbPb compared to pp collisions at √S NN=2.76 TeV

The transverse momentum spectra of charged particles have been measured in pp and PbPb collisions at √S NN=2.76 TeV by the CMS experiment at the LHC. In the transverse momentum range p T=5-10 GeV/c, the charged particle yield in the most central PbPb collisions is suppressed by up to a factor of 7 c...

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Bibliographic Details
Main Authors: Chatrchyan, S, Khachatryan, V, Sirunyan, A, Tumasyan, A, Adam, W, Bergauer, T, Dragicevic, M, Erö, J, Fabjan, C, Friedl, M, Frühwirth, R, Ghete, V, Hammer, J, Hoch, M, Hörmann, N, Hrubec, J, Jeitler, M, Kiesenhofer, W, Krammer, M, Liko, D, Mikulec, I, Pernicka, M, Rahbaran, B, Rohringer, C, Rohringer, H
Format: Journal article
Published: 2012
Description
Summary:The transverse momentum spectra of charged particles have been measured in pp and PbPb collisions at √S NN=2.76 TeV by the CMS experiment at the LHC. In the transverse momentum range p T=5-10 GeV/c, the charged particle yield in the most central PbPb collisions is suppressed by up to a factor of 7 compared to the pp yield scaled by the number of incoherent nucleon-nucleon collisions. At higher p T, this suppression is significantly reduced, approaching roughly a factor of 2 for particles with p T in the range p T=40-100 GeV/c. © 2012 CERN for the benefit of the CMS collaboration.

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