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

The CMS collaboration

Research output: Contribution to journalArticle

6 Scopus citations

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, pT, from 0.5 to 100 GeV. A previously reported pT 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, RAA *, are constructed and compared to previous measurements and theoretical predictions. In head-on collisions, the RAA * has a value of 0.17 in the pT 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 (US)
Article number138
JournalJournal of High Energy Physics
Volume2018
Issue number10
DOIs
StatePublished - Oct 1 2018

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Keywords

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

Fingerprint Dive into the research topics of 'Charged-particle nuclear modification factors in XeXe collisions at √sNN=5.44 TeV'. Together they form a unique fingerprint.

  • Cite this