Scaling p_T distributions for p and \bar{p} produced in Au+Au collisions at RHIC

Details Scaling p_T distributions for p and \bar{p} produced in Au+Au collisions at RHIC Scaling p_T distributions for p and \bar{p} produced in Au+Au collisions at RHIC

2007-04-09

arxiv.org/abs/0704.1062v2

Phys.Rev.C76:044910,2007

Physics

Nuclear Physics

Nuclear Theory

5 pages in revtex,7 eps figures included, will be appeared in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.76.044910

With the experimental data from STAR and PHENIX on the centrality dependence of the $p_T$ spectra of protons and anti-protons produced at mid-rapidity in Au+Au collisions at 200 GeV, we show that for protons and anti-protons there exists a scaling distribution independent of the colliding centrality. The scaling functions can also describe data from BRAHMS for both proton and anti-proton spectra at $y=2.2$ and 3.2. The scaling behaviors are shown to be incompatible with the usual string fragmentation scenario for particle production.

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