论文标题
重型离子碰撞中外来高核的形成和动力学
Formation and dynamics of exotic hypernuclei in heavy-ion collisions
论文作者
论文摘要
用微观传输模型对重离子碰撞中外来高核的动力学进行了彻底研究。运输模型中实施了HyperON（$λ$，$σ$和$ξ$）的所有可能的频道（$λ$，$σ$和$ξ$）。使用Wigner-unction方法构建光复杂片段（z $ \ leq $ 2）。经典的相空间合并用于识别重核和超缘，并采用统计模型来描述衰减过程。联合方法很好地再现了来自阿拉丁协作的可用实验数据的核碎片反应。发现奇怪颗粒的中等潜力会影响陌生的产生和碎片形成。超缘主要是在弹丸或靶标的速度区域中产生的，与核碎片相比，产量降低了三阶幅度。模型很好地描述了Hyphi数据的超核动力学。讨论了在高强度重离子加速器设施（HIAF）上产生富含中子的超缘的可能实验。
The dynamics of exotic hypernuclei in heavy-ion collisions has been investigated thoroughly with a microscopic transport model. All possible channels on hyperon ($Λ$, $Σ$ and $Ξ$) production near threshold energies are implemented in the transport model. The light complex fragments (Z$\leq$2) are constructed with the Wigner-function method. The classical phase-space coalescence is used for recognizing heavy nuclear and hyperfragments and the statistical model is taken for describing the decay process. The nuclear fragmentation reactions of the available experimental data from the ALADIN collaboration are well reproduced by the combined approach. It is found that the in-medium potentials of strange particles influence the strangeness production and fragment formation. The hyperfragments are mainly created in the projectile or target-like rapidity region and the yields are reduced about the 3-order magnitude in comparison to the nuclear fragments. The hypernuclear dynamics of HypHI data is well described with the model. The possible experiments for producing the neutron-rich hyperfragments at the high-intensity heavy-ion accelerator facility (HIAF) are discussed.
