Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at sqrt(s[NN]) = 5.02 TeV

Abstract : The CMS Collaboration presents the first measurement of the differential cross section of jets from charm quarks produced in proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of sqrt(s[NN]) = 5.02 TeV, as well as results from charm quark jets in proton-proton (pp) collisions at sqrt(s)= 2.76 and 5.02 TeV. By comparing the yields of the pPb and pp collision systems at the same energy, a nuclear modification factor for charm jets in pPb collisions at sqrt(s[NN]) = 5.02 TeV of R[pA] = 0.92 +/- 0.07 (stat) +/- 0.11 (syst) is obtained. This is consistent with an absence of final-state energy loss for charm quarks in pPb collisions. In addition, the fraction of jets coming from charm quarks is found to be consistent with that predicted by PYTHIA 6 for pp collisions at sqrt(s)= 2.76 and 5.02 TeV, and is independent of the jet transverse momentum from 55 to 400 GeV.
Type de document :
Pré-publication, Document de travail
Submitted to Phys. Lett. B. All figures can be found at http://cms-results.web.cern.ch/cms-result.. 2017
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http://hal.in2p3.fr/in2p3-01424868
Contributeur : Sylvie Flores <>
Soumis le : mardi 3 janvier 2017 - 08:38:18
Dernière modification le : mardi 16 janvier 2018 - 16:08:09

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  • HAL Id : in2p3-01424868, version 1
  • ARXIV : 1612.08972

Citation

A.M. Sirunyan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at sqrt(s[NN]) = 5.02 TeV. Submitted to Phys. Lett. B. All figures can be found at http://cms-results.web.cern.ch/cms-result.. 2017. 〈in2p3-01424868〉

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