Xiaofang Chen et al 2010 J. Phys. G: Nucl. Part. Phys. 37 015004 doi:10.1088/0954-3899/37/1/015004
A study on the anomaly of p over π ratios in Au + Au collisions with jet quenching
Xiaofang Chen1,2, Hanzhong Zhang1,2,3, Ben-Wei Zhang1,2 and Enke Wang1,2
Show affiliationsThe ratios of p/π at large transverse momentum in central Au + Au collisions at RHIC are studied in the framework of jet quenching based on a next-to-leading order pQCD parton model. It is shown that theoretical calculations with a gluon energy loss larger than the quark energy loss will naturally lead to smaller p/π ratios at large transverse momentum in Au + Au collisions than those in p + p collisions at the same energy. Scenarios with equal energy losses for gluons and quarks and a strong jet conversion are both explored and it is demonstrated that in both scenarios p/π ratios at high pT in central Au + Au collisions are enhanced and the calculated ratios of protons over pions approach the experimental measurements. However, 
in the latter scenario is found to fit data better than that in the former scenario.
- PACS
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25.75.Dw Particle and resonance production
14.40.Aq pi, K, and eta mesons
13.85.-t Hadron-induced high- and super-high-energy interactions (energy>10 GeV)
24.85.+p Quarks, gluons, and QCD in nuclear reactions
25.75.Nq Quark deconfinement, quark–gluon plasma production, and phase transitions
- Subjects
- Dates
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Issue 1 (January 2010)
Received 6 May 2009
Published 2 December 2009
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A study on the anomaly of p over π ratios in Au + Au collisions with jet quenching
Xiaofang Chen et al 2010 J. Phys. G: Nucl. Part. Phys. 37 015004
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