Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity p+Pb Collisions at sNN =8.16 TeV

The CMS collaboration

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41 Citations (Scopus)

Abstract

The elliptic azimuthal anisotropy coefficient (v2) is measured for charm (D0) and strange (KS0, Λ, Ξ-, and Ω-) hadrons, using a data sample of p+Pb collisions collected by the CMS experiment, at a nucleon-nucleon center-of-mass energy of sNN=8.16 TeV. A significant positive v2 signal from long-range azimuthal correlations is observed for all particle species in high-multiplicity p+Pb collisions. The measurement represents the first observation of possible long-range collectivity for open heavy flavor hadrons in small systems. The results suggest that charm quarks have a smaller v2 than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at sNN=5.02 TeV, also presented.

Original languageEnglish
Article number082301
Number of pages18
JournalPhysical Review Letters
Volume121
Issue number8
DOIs
Publication statusPublished - 21 Aug 2018

Keywords

  • RELATIVISTIC NUCLEAR COLLISIONS
  • RANGE ANGULAR-CORRELATIONS
  • LONG-RANGE
  • 2-PARTICLE CORRELATIONS
  • SIDE
  • PPB
  • COLLECTIVITY
  • EVENT

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