标题： 重离子碰撞中在AGS能量下的平均场效应 显示英文标题

标题： Mean field effects in heavy-ion collisions at AGS energies

摘要： 是否存在重离子碰撞中的平均场效应在AGS能量下是在相对论输运(ART)模型的框架下研究的。 发现在Au+Au在$P_{beam}/A=$11.6 GeV/c的中心碰撞中，一个简单的、类似Skyrme的核平均场满足因果性要求，分别将级联模型中达到的最大重子和能量密度减少了约30%和40%。 平均场对各种强子的包括单粒子可观测量的影响最多为20%。 然而我们表明，平均场使重子横向集体流的强度增加了2.5倍。 显示英文摘要

摘要： The question whether mean field effects exist in heavy-ion collisions at AGS energies is studied in the framework of A Relativistic Transport (ART) model. It is found that in central collisions of Au+Au at $P_{beam}/A=$11.6 GeV/c a simple, Skyrme-type nuclear mean field satisfying the causality requirement reduces the maximum baryon and energy densities reached in the cascade model by about 30\% and 40\%, respectively. The mean field affects the inclusive, single particle observables of various hadrons by at most 20\%. We show, however, that the mean field causes a factor of 2.5 increase in the strength of the baryon transverse collective flow.