Charged-particle nuclear modification factors in XeXe collisions at √sNN=5.44 TeV

The CMS collaboration

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6 Citations (Scopus)

Abstract

The differential yields of charged particles having pseudorapidity within |η| < 1 are measured using xenon-xenon (XeXe) collisions at sNN=5.44 TeV. The data, corresponding to an integrated luminosity of 3.42 μb −1 , were collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision centrality and transverse momentum, p T , from 0.5 to 100 GeV. A previously reported p T spectrum from proton-proton collisions at s=5.02 TeV is used for comparison after correcting for the difference in center-of-mass energy. The nuclear modification factors using this reference, R AA * , are constructed and compared to previous measurements and theoretical predictions. In head-on collisions, the R AA * has a value of 0.17 in the p T range of 6–8 GeV, but increases to approximately 0.7 at 100 GeV. Above ≈6 GeV, the XeXe data show a notably smaller suppression than previous results for lead-lead (PbPb) collisions at sNN=5.02 TeV when compared at the same centrality (i.e., the same fraction of total cross section). However, the XeXe suppression is slightly greater than that for PbPb in events having a similar number of participating nucleons.

Original languageEnglish
Article number138
JournalJournal of High Energy Physics
Volume2018
Issue number10
DOIs
Publication statusPublished - 1 Oct 2018

Keywords

  • Hadron-Hadron scattering (experiments)
  • Heavy-ion collision
  • Quark gluon plasma

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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