论文标题
核子剖面对$π$的初始化影响中级能量的重离子碰撞产量
Initialization effects of nucleon profile on the $π$ yields in heavy-ion collisions at medium energies
论文作者
论文摘要
在依赖Isospin的Boltzmann-Uehling-Uhlenbeck（IBUU）传输模型的背景下，我们研究了重离子碰撞中$π$的问题。我们使用两个不同模型（Skyrme-Hartree-fock（SHF）模型和配置相互作用壳模型（SM）生成核子密度。实际上，在SHF模型中平均，在SM中明确考虑了核之间的相关性。作为我们的理论框架的应用，我们计算了$π^{ - } $和$π^{+} $的收益在核的碰撞中，$ a = 30-40 $核。我们使用了不同的谐波振荡器长度$ b_ {ho} $来生成SM的谐波振荡器基础，以同时研究理论和实验案例。发现具有$ b_ {ho} $ = 2.5 fm的SM框架可以通过$π$介子的收益率来区分，在这种情况下，壳模型计算出的密度分布在碰撞中产生更多的$π$。相比之下，用$ b_ {ho} $ = 2.0 fm的SM以SHF为特征，其double $π^{ - }/π^{+} $比率具有不同的大撞击参数，从中可以找到双$ $π^{ - }/π^{+} $ sm sm sm smoth and Smother and Smoth and Shf。
We study a problem of $π$ production in heavy ion collisions in the context of the Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model. We generated nucleon densities using two different models, the Skyrme-Hartree-Fock (SHF) model and configuration interaction shell model (SM). Indeed, inter-nucleon correlations are explicitly taken into account in SM, while they are averaged in the SHF model. As an application of our theoretical frameworks, we calculated the $π^{-}$ and $π^{+}$ yields in collisions of nuclei with $A = 30-40$ nucleons. We used different harmonic oscillator lengths $b_{HO}$ to generate the harmonic oscillator basis for SM in order to study both theoretical and experimental cases. It is found that SM framework with $b_{HO}$ = 2.5 fm and SHF can be distinguished by the yield of $π$ mesons, in this case the density distribution calculated by the shell model produces more $π$ in the collision. In comparison, SM with $b_{HO}$ = 2.0 fm is characterized from SHF by the double $π^{-}/π^{+}$ ratios with different large impact parameters, from which one can find the double $π^{-}/π^{+}$ ratios of SM change smoother and are less than those of SHF.
