论文标题
部分可观测时空混沌系统的无模型预测
Cold and hot nuclear matter effects on $J/ψ$ production at RHIC-BES energies
论文作者
论文摘要
在运输方法中，在Rhic-Bes Energies的Au-Au碰撞中系统地研究了集成和微分$ J/ψR_{AA} $，包括在初始条件和碰撞项下分别包括冷和热核效应。随着能量的减少，虽然QGP火球的温度，寿命和大小降低，但最初产生的Charmonia的核吸收越来越强，并且核阴影对炭再生的核阴影效果首先转化为反遮盖，然后再进行阴影。作为冷核效应和热核效应之间的竞争，QGP阶段对于$ \ sqrt {s_ {nn}} $ = 200，62.4，54.4和39 GEV仍然很重要，但在$ \ sqrt {s_ {nn}} $ = 14.5 Gev时变得可忽略不计。
Integrated and differential $J/ψ R_{AA}$ are systematically studied in Au-Au collisions at RHIC-BES energies in a transport approach, including cold and hot nuclear effects respectively in the initial condition and the collision terms. With decreasing energy, while the temperature, life time and size of the QGP fireball decrease, the nuclear absorption of the initially produced charmonia is more and more strong, and the nuclear shadowing effect on charmonium regeneration goes to anti-shadowing first and then to shadowing again. As a competition between the cold and hot nuclear effects, the QGP phase is still important for charmonium production at $\sqrt{s_{NN}}$=200, 62.4, 54.4 and 39 GeV but becomes negligible at $\sqrt{s_{NN}}$=14.5 GeV.
