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Scaling properties of proton and antiproton production in $\sqrt{S_{NN}}$=200 GeV Au+Au collisions
- Source :
- Physical Review Letters, Physical Review Letters, American Physical Society, 2003, 91, pp.172301-1-6. ⟨10.1103/PhysRevLett.91.172301⟩, Physical Review Letters, 2003, 91, pp.172301-1-6. ⟨10.1103/PhysRevLett.91.172301⟩
- Publication Year :
- 2003
- Publisher :
- HAL CCSD, 2003.
-
Abstract
- We 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.<br />325 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
Details
- Language :
- English
- ISSN :
- 00319007 and 10797114
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters, Physical Review Letters, American Physical Society, 2003, 91, pp.172301-1-6. ⟨10.1103/PhysRevLett.91.172301⟩, Physical Review Letters, 2003, 91, pp.172301-1-6. ⟨10.1103/PhysRevLett.91.172301⟩
- Accession number :
- edsair.doi.dedup.....dd8411f9c5caede75470f1b16c7b75ef