Centrality and pT dependence of charged particle RAA in PbPb collisions at sqrt(sNN) = 2.76 TeV

Details Centrality and pT dependence of charged particle RAA in PbPb collisions at sqrt(sNN) = 2.76 TeV Centrality and pT dependence of charged particle RAA in PbPb collisions at sqrt(sNN) = 2.76 TeV

2011-07-10

arxiv.org/abs/1107.1862v2

Physics

Nuclear Physics

Nuclear Experiment

Proceedings of parallel talk at the XXII International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Quark Matt

Scientific paper

The transverse momentum pT spectra of charged particles is measured by CMS as a function of collision centrality in PbPb collisions at sqrt(sNN) = 2.76 TeV. The results are compared to a pp reference spectrum, constructed by interpolation between sqrt(s) = 0.9 and 7 TeV measurements. The nuclear modification factor RAA is constructed by dividing the PbPb pT spectrum, normalized to the number of binary collisions (Ncoll), by the pp spectrum. Measured RAA in 0-5% centrality bin is compared to several theoretical predictions.

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