论文标题
从合并和统计热模型的角度观察重离子碰撞中光超核产生的能量依赖性
Energy dependence of light hypernuclei production in heavy-ion collisions from a coalescence and statistical-thermal model perspective
论文作者
论文摘要
在巨大的离子碰撞中，在巨大的光束能量和系统尺寸的重离子碰撞中比较了光超核产生的比较。我们发现两种方法都提供了通常相似的结果，并且特定细节的差异。特别是Hypertriton与$λ$的比率受合并过程的源半径$ΔR$的影响以及规范效应。另一方面，双重比率$ s_3 $几乎与规范效应无关，这与结合相反。因此，$ s_3 $的光束能量依赖性和中心性依赖性均可用于限制乳房源半径。为此，当前可用的数据还不够。椭圆流被证明不受核的源大小的影响，并且观察到椭圆流的几乎完美的质量缩放。我们的预测进一步表明，Alice Data排除了H-Dibaryon（$λλ$）的存在。
A comparison of light hypernuclei production, from UrQMD+coalescence and the thermal model, in heavy ion collisions over a wide range of beam energies and system sizes is presented. We find that both approaches provide generally similar results, with differences in specific details. Especially the ratios of hypertriton to $Λ$ are affected by both the source radius $Δr$ of the coalescence procedure as well as canonical effects. On the other hand, the double ratio $S_3$ is almost independent of canonical effects, which is in contrast to coalescence. Thus, both the beam energy dependence and centrality dependence of $S_3$ can be used to constrain the hypertriton source radius. To do so the currently available data is not yet sufficient. Elliptic flow is shown to be unaffected by the source size of the nuclei and an almost perfect mass scaling of the elliptic flow is observed. Our predictions further suggest that the existence of the H-dibaryon ($ΛΛ$) seems ruled out by ALICE data.
