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Dynamics of light hypernuclei in collisions of $$^{197}$$ 197 Au+ $$^{197}$$ 197 Au at GeV energies
The European Physical Journal A ( IF 2.6 ) Pub Date : 2021-01-11 , DOI: 10.1140/epja/s10050-020-00305-7
Zhao-Qing Feng

The dynamics of light hypernuclei and nuclear clusters produced in \(^{197}\)Au+\(^{197}\)Au collisions has been investigated thoroughly with a microscopic transport model. All possible channels of hyperon production and transportation of hyperons in nuclear medium are implemented into the model. The light complex fragments are recognized with the Wigner density approach at the stage of freeze out in nuclear collisions. The isospin diffusion in the collisions is responsible for the neutron-rich cluster formation. The collective flows of nuclear clusters are consistent with the experimental data from FOPI collaboration. It is found that the influence of the hyperon-nucleon potential on the free hyperons is negligible, but available for the light hypernuclide formation. The directed and elliptic flows of \(^{3}_{\Lambda }\)H and \(^{4}_{\Lambda }\)H at incident energies of 2, 2.5, 3, 3.5 and 4 GeV/nucleon are investigated thoroughly and manifest the same structure with the nuclear clusters. The hypernuclear yields are produced in a wide rapidity and momentum regime with increasing the beam energy.



中文翻译:

GeV能量下$$ ^ {197} $$ 197 Au + $$ ^ {197} $$ 197 Au碰撞中的光超核的动力学

\(^ {197} \) Au + \(^ {197} \)中产生的光超核和核簇的动力学金的碰撞已经用微观传输模型进行了彻底的研究。模型中实现了超子在核介质中产生和运输的所有可能途径。在核碰撞中冻结的阶段,利用维格纳密度法可以识别出轻的复合物碎片。碰撞中的同位旋扩散是富中子团簇形成的原因。核簇的集体流动与FOPI合作的实验数据一致。发现超子-核子势对游离超子的影响可以忽略不计,但可用于轻型超核素的形成。\(^ {3} _ {\ Lambda} \) H和\(^ {4} _ {\ Lambda} \)的有向和椭圆流彻底研究了入射能为2、2.5、3、3.5和4 GeV /核子的H,并显示出与核簇相同的结构。随着束能量的增加,超核产量以较快的速度和动量形式产生。

更新日期:2021-01-12
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