Scaling properties of proton and anti-proton production in s(nn)**(1.2) 200-GeV Au+Au collisions

S.S. Adler, T. Peitzmann

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We report on the yield of protons and antiprotons, as a function of centrality and transverse momentum, in Au+Au collisions at √sNN=200   GeV measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider. In central collisions at intermediate transverse momenta (1.5<pT<4.5   GeV/c) a significant fraction of all produced particles are protons and antiprotons. They show a centrality-scaling behavior different from that of pions. The ¯p/π and p/π ratios are enhanced compared to peripheral Au+Au, p+p, and e+e− collisions. This enhancement is limited to pT<5   GeV/c as deduced from the ratio of charged hadrons to π0 measured in the range 1.5<pT<9   GeV/c.
Original languageEnglish
Article number172301
JournalPhysical Review Letters
Volume91
DOIs
Publication statusPublished - 2003

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