Scaling properties of proton and anti-proton production in sqrt(s_NN) = 200 GeV Au + Au collisions

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dc.creatorPHENIX Collaboration
dc.creatorAdler, S. S.
dc.date2003-05-30
dc.date2003-08-29
dc.date.accessioned2026-07-07T12:04:04Z
dc.date.available2026-07-07T12:04:04Z
dc.descriptionWe report on the yield of protons and anti-protons, as a function of centrality and transverse momentum, in Au+Au collisions at sqrt(s_NN) = 200 GeV measured at mid-rapidity by the PHENIX experiment at RHIC. 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 anti-protons. They show a centrality-scaling behavior different from that of pions. The p-bar/pion and p/pion ratios are enhanced compared to peripheral Au+Au, p+p, and electron+positron 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.
dc.description325 authors, 6 pages text, 4 figures, RevTeX 4. Minor changes to text and figures to meet PRL length restrictions; no changes to figures; resubmitted to PRL. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
dc.identifierhttps://arxiv.org/abs/nucl-ex/0305036
dc.identifierhttp://arxiv.org/abs/nucl-ex/0305036
dc.identifierPhys.Rev.Lett.91:172301,2003
dc.identifierdoi:10.1103/PhysRevLett.91.172301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208007
dc.subjectNuclear Experiment
dc.titleScaling properties of proton and anti-proton production in sqrt(s_NN) = 200 GeV Au + Au collisions
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