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A direct probe of Λ potential in nuclear medium
Physics Letters B ( IF 4.4 ) Pub Date : 2024-04-21 , DOI: 10.1016/j.physletb.2024.138662
Gao-Chan Yong

Using the Liège intranuclear-cascade model together with the ablation model ABLA, an investigation is conducted into the effects of Λ potential in Λ-nucleus and Λ-hypernucleus-nucleus collisions across various beam energies. The findings show that the angle and transverse-momentum distributions of scattered Λ hyperon, the scattering cross section of the Λ hyperon in Λ-nucleus collisions as well as the rapidity distribution of Λ hyperon in Λ-hypernucleus-nucleus collisions are significantly influenced by the strength of the Λ potential in these scattering reactions across various beam energies. These demonstrations, unhindered by the uncertainties of Λ and hypernuclei productions in nuclear medium, allow for a direct investigation of the Λ potential, especially its momentum dependence. The criticality of probing the Λ potential is closely associated with the resolution of the “hyperon puzzle” in neutron stars.

中文翻译:


核介质中Λ势的直接探测



使用列日核内级联模型和烧蚀模型 ABLA,研究了不同束能量下 Λ 核和 Λ 超核-核碰撞中 Λ 势的影响。结果表明,散射Λ超子的角度和横向动量分布、Λ核碰撞中Λ超子的散射截面以及Λ超核-核碰撞中Λ超子的快速度分布均受这些散射反应在不同光束能量下的Λ势的强度。这些演示不受 Λ 和核介质中超核产生的不确定性的阻碍,允许直接研究 Λ 势,特别是其动量依赖性。探测Λ势的关键性与中子星“超子之谜”的解决密切相关。
更新日期:2024-04-21
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