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arXiv · 0704.1062

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

W. C. Zhang·Y. Zeng·W. X. Nie·L. L. Zhu·C. B. Yang
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Abstract

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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W. C. Zhang, Y. Zeng, W. X. Nie, L. L. Zhu, C. B. Yang. 2007-10-12. Scaling p_T distributions for p and \bar{p} produced in Au+Au collisions at RHIC. https://doi.org/10.1103/physrevc.76.044910

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