Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

10-2003

Journal or Book Title

Physical Review Letters

Volume

91

Issue

17

First Page

172301

DOI

10.1103/PhysRevLett.91.172301

Abstract

We report on the yield of protons and antiprotons, as a function of centrality and transverse momentum, in Au+Au collisions at rootS(NN)=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 < p(T) < 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) over bar/pi and p/pi ratios are enhanced compared to peripheral Au+Au, p+p, and e(+)e(-) collisions. This enhancement is limited to p(T) < 5 GeV/c as deduced from the ratio of charged hadrons to pi(0) measured in the range 1.5 < p (T) < 9 GeV/c.

Comments

This article is published as Adler, Stephen Scott, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas et al. "Scaling Properties of Proton and Antiproton Production in √sNN= 200 GeV Au+ Au Collisions." Physical review letters 91, no. 17 (2003): 172301. DOI:10.1103/PhysRevLett.91.172301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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