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论文类型：期刊论文

发表时间：2014-11-01

发表刊物：SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY

收录刊物：SCIE、EI

卷号：57

期号：11

页面范围：2070-2078

ISSN号：1674-7348

关键字：jet quenching; collective flow; quark-gluon-plasma

摘要：In the presence of collective flow a new model potential describing the interaction of the hard jet with scattering centers is derived based on the static color-screened Yukawa potential. The flow effect on jet quenching with detailed balance is investigated in pQCD. It turns out, considering the collective flow with velocity nu(z) along the jet direction, the collective flow decreases the LPM destructive interference comparing to that in the static medium. The gluon absorption plays a more important role in the moving medium. The collective flow increases the energy gain from gluon absorption, however, decreases the energy loss from gluon radiation, which is (1 - nu(z)) times as that in the static medium to the first order of opacity. In the presence of collective flow, the second order in opacity correction is relatively small compared to the first order. So that the total effective energy loss is decreased. The flow dependence of the energy loss will affect the suppression of high p(T) hadron spectrum and anisotropy parameter nu(2) in high-energy heavy-ion collisions.