Spectra and ratios of identified particles in Au+Au and d+Au collisions at √sNN=200 GeV

PHENIX Collaboration

Research output: Contribution to journalArticlepeer-review

132 Scopus citations

Abstract

The transverse momentum (pT) spectra and ratios of identified charged hadrons (π±, K±, p, p̄) produced in √sNN=200 GeV Au+Au and d+Au collisions are reported in five different centrality classes for each collision species. The measurements of pions and protons are reported up to pT=6 GeV/c (5 GeV/c), and the measurements of kaons are reported up to pT=4 GeV/c (3.5 GeV/c) in Au+Au (d+Au) collisions. In the intermediate pT region, between 2 and 5 GeV/c, a significant enhancement of baryon-to-meson ratios compared to those measured in p+p collisions is observed. This enhancement is present in both Au+Au and d+Au collisions and increases as the collisions become more central. We compare a class of peripheral Au+Au collisions with a class of central d+Au collisions which have a comparable number of participating nucleons and binary nucleon-nucleon collisions. The pT-dependent particle ratios for these classes display a remarkable similarity, which is then discussed.

Original languageEnglish
Article number024906
JournalPhysical Review C - Nuclear Physics
Volume88
Issue number2
DOIs
StatePublished - 22 Aug 2013
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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