Study of high-pT charged particle suppression in PbPb compared to pp collisions at √SNN=2.76 TeV


Chatrchyan S., Khachatryan V., Sirunyan A., Tumasyan A., Adam W., Bergauer T., ...More

European Physical Journal C, vol.72, no.3, pp.1-22, 2012 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 72 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1140/epjc/s10052-012-1945-x
  • Journal Name: European Physical Journal C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-22
  • Yıldız Technical University Affiliated: Yes

Abstract

The transverse momentum spectra of charged particles have been measured in pp and PbPb collisions at √SNN=2.76 TeV by the CMS experiment at the LHC. In the transverse momentum range pT=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 pT, this suppression is significantly reduced, approaching roughly a factor of 2 for particles with pT in the range pT=40-100 GeV/c. © 2012 CERN for the benefit of the CMS collaboration.