论文标题
在rhic束能量扫描处使用的重离子碰撞中（抗）核共聚的光（抗）核共聚的光（抗）核的生产特征
Production characteristics of light (anti-)nuclei from (anti-)nucleon coalescence in heavy ion collisions at energies employed at the RHIC beam energy scan
论文作者
论文摘要
通过从Quark组合模型获得的动力学冷冻核子和抗核物，我们研究了相对论重离子碰撞中（抗）核素合并机制中光核和反核的产生。我们得出了不同光核的动量分布的分析公式，并将其应用于（抗）deuterons（$ d $，$ \ bar d $）和（anti-）tritons（$ t $，$ t $，$ \ bar t $）中的横向动量（$ p_t $）光谱，以$ \ \ s_s =nn。 19.6，27，39，54.4 Gev。我们发现可以很好地复制这些$ P_T $光谱的实验数据。我们进一步研究了不同光（抗）核的产率和产率比，并自然地解释了它们有趣的行为是碰撞能量的函数。我们特别指出的是，应仔细校正多粒子的产量比$ tp/d^2 $，以探测质子的弱衰减，以探测光核的生产特征。我们所有的结果表明，（抗）核子的合并机制对于在Rhic Beam Energy扫描能量上产生光核和抗核里的生产起主要作用。
With the kinetic freeze-out nucleons and antinucleons obtained from the quark combination model, we study the production of light nuclei and antinuclei in the (anti-)nucleon coalescence mechanism in relativistic heavy ion collisions. We derive analytic formulas of the momentum distributions of different light nuclei and apply them to compute transverse momentum ($p_T$) spectra of (anti-)deuterons ($d$, $\bar d$) and (anti-)tritons ($t$, $\bar t$) in Au-Au collisions at $\sqrt{s_{NN}}=$7.7, 11.5, 19.6, 27, 39, 54.4 GeV. We find that the experimental data available for these $p_T$ spectra can be well reproduced. We further study the yields and yield ratios of different light (anti-)nuclei and naturally explain their interesting behaviors as a function of the collision energy. We especially point out that the multi-particle yield ratio $tp/d^2$ should be carefully corrected from hyperon weak decays for protons to probe the production characteristics of light nuclei. All of our results show that the coalescence mechanism for (anti-)nucleons plays a dominant role for the production of light nuclei and antinuclei at the RHIC beam energy scan energies.
