科研之友
微信
新浪微博
Facebook
分享链接
摘要
The ratios of p/pi at large transverse momentum in central Au + Au collisions at RIIC 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/pi 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/pi ratios at high p(T) in central Au + Au collisions are enhanced and the calculated ratios of protons over pions approach the experimental measurements. However, (p) over bar /p in the latter scenario is found to fit data better than that in the former scenario.
