Measurement of charged particle R[subscript AA] at high p[subscript T] in PbPb collisions at √s[subscript NN] = 2.76 TeV with CMS
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Krajczár-2013-Measurement of charg.pdf
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Author(s)
Krajczar, Krisztian F.
Date Issued
August 2013
Journal
Nuclear Physics A
Publisher
Elsevier
Citation
Krajczar, Krisztian. “Measurement of charged particle R[subscript AA] at high p[subscript T] in PbPb collisions at √s[subscript NN] = 2.76 TeV with CMS.” Nuclear Physics A 910–911 (August 2013): 339–342. © CERN for the benefit of the CMS Collaboration.
Version
Final published version
Abstract
Charged particle transverse momentum (p[subscript T]) spectra have been measured by CMS for pp and PbPb collisions at the same √sNN = 2.76 TeV collision energy per nucleon pairs. Calorimeter-based jet triggers are employed to enhance the statistical reach of the high-p[subscript T] measurements. The nuclear modification factor (R[subscript AA]) is obtained in bins of collision centrality for the PbPb data sample dividing by the measured pp reference spectrum. In the range p[subscript T] = 5 – 10 GeV/c, the charged particle yield in the most central PbPb collisions is suppressed by up to a factor of 7. At higher p[subscript T], this suppression is significantly reduced, approaching a factor of 2 for particles with p[subscript T] = 40 – 100 GeV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1016/j.nuclphysa.2012.12.048
