论文标题
光核产生的光束能量依赖性Au+Au碰撞
Beam Energy dependence of Light Nuclei Production in Au+Au Collisions
论文作者
论文摘要
我们研究了（反）deuteron和（抗）Triton生产的碰撞能量依赖性，在$ \ sqrt {s_ \ mathrm {nn}} = $ 7.7、11.7、11.5、11.5、19.6、27、27、27、39、62.4和200 gev，使用原子核凝固模型。动力学冻结处的核子所需的相位空间分布是通过新的3D混合动力学模型（\ texttt {iebe-music}）生成的。我们的模型计算预测，（抗）deuteron（$ b_2（d）$和$ b_2（\ bar {d}）$）的合并参数随着碰撞的增加而单调降低，而光核产量比$ n_t n_t n_p/n_p/n_d^2 $与collision collision collision collision Ensive保持不变。这些计算出的可观察物无法重现Star协作中相应数据的非单调行为。在我们的模型中不包含临界点的任何效果，我们的结果可以作为光核的产量的基线预测，从而在寻找重离子碰撞的实验束能量扫描中可能的QCD临界点。
We study the collision energy dependence of (anti-)deuteron and (anti-)triton production in the most central Au+Au collisions at $\sqrt{s_\mathrm{NN}}=$ 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV, using the nucleon coalescence model. The needed phase-space distribution of nucleons at the kinetic freeze-out is generated from a new 3D hybrid dynamical model (\texttt{iEBE-MUSIC}) by using a smooth crossover equation of state (EoS) without a QCD critical point. Our model calculations predict that the coalescence parameters of (anti-)deuteron ($B_2(d)$ and $B_2(\bar{d})$) decrease monotonically as the collision energy increases, and the light nuclei yield ratio $N_t N_p/N_d^2$ remains approximately a constant with respect to the collision energy. These calculated observables fail to reproduce the non-monotonic behavior of the corresponding data from the STAR Collaboration. Without including any effects of the critical point in our model, our results serve as the baseline predictions for the yields of light nuclei in the search for the possible QCD critical points from the experimental beam energy scan of heavy ion collisions.
