论文标题
相对论重离子碰撞中光核产量比的旋转增强
Spinodal Enhancement of Light Nuclei Yield Ratio in Relativistic Heavy Ion Collisions
论文作者
论文摘要
使用相对论的传输模型来描述Au+au碰撞中$ \ sqrt {s_ {s_ {nn}} = 3-200 $ GEV的量子染色体动力学的演变，我们研究了一阶相过渡在此问题中的一阶相变的效果。 （$ P $），Deuteron（$ D $）和Triton（$ t $）。我们发现，在一阶阶段过渡过程中，旋转不稳定产生的较大密度不均匀性可以在随后的野蛮物质的快速扩展中生存，并在中央碰撞中以$ \ sqrt {s_ {s_ {nn}} = 3-5 $ GEV的相关性，在中央碰撞中增强了$ tp/d^2 $，如在实验中所看到的。但是，这种增强性会随着碰撞中心性的增加而消失，并且在$ \ sqrt {s_ {nn}} = 3 $ GEV的几乎平坦的中心性依赖性（$ tp/d^2 $）也可以用作一阶相变的信号。
Using a relativistic transport model to describe the evolution of the quantum chromodynamic matter produced in Au+Au collisions at $\sqrt{s_{NN}}=3-200$ GeV, we study the effect of a first-order phase transition in the equation of state of this matter on the yield ratio $N_tN_p/ N_d^2$ ($tp/d^2$) of produced proton ($p$), deuteron ($d$), and triton ($t$). We find that the large density inhomogeneities generated by the spinodal instability during the first-order phase transition can survive the fast expansion of the subsequent hadronic matter and lead to an enhanced $tp/d^2$ in central collisions at $\sqrt{s_{NN}}=3-5$ GeV as seen in the experiments by the STAR Collaboration and the E864 Collaboration. However, this enhancement subsides with increasing collision centrality, and the resulting almost flat centrality dependence of $tp/d^2$ at $\sqrt{s_{NN}}=3$ GeV can also be used as a signal for the first-order phase transition.
