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arXiv 2602.18356nucl-thastro-ph.HEastro-ph.SR
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通过地表和天文数据约束ΛΛ相互作用

Constraining the $ΛΛ$ interaction with terrestrial and astronomical data

Soongsil University(崇实大学);Daegu University(庆北大学)

Yusuke Tanimura, Chang Ho Hyun, Myung-Ki Cheoun

AI总结:

本文通过地表和天文数据约束ΛΛ相互作用,利用Skyrme框架结合双Λ超核和中子星观测,探讨s波、p波及三体力对中子星性质的影响,提出适用于密集核物质的方程状态。

摘要:

地表双Λ超核数据和中子星的天文观测为ΛΛ相互作用提供了互补的约束。在本工作中,我们基于KIDS(韩国-IBS-大邱-SKKU)模型,在Skyrme能量密度泛函框架内研究ΛΛ相互作用。我们采用一种Skyrme型ΛΛ相互作用,包括标准的s波和p波项,以及一个密度依赖项,有效代表NΛΛ三体力。s波项通过双Λ超核数据补充伪数据,这些伪数据来自包含更重超核的核芯+2Λ三体模型计算。我们展示更重系统数据对同时约束两个s波参数至关重要。我们进一步探讨p波和NΛΛ成分对中子星性质的影响,并发现适当的排斥贡献使这些项与当前中子星质量-半径观测一致。这些结果表明,当前框架在广泛密度范围内为密集(N,Λ)物质提供了现象学可接受的方程状态,并强调了未来对更重双Λ超核实验数据的重要性。

英文摘要:

Terrestrial double-$Λ$ hypernuclear data and astronomical observations of neutron stars provide complementary constraints on the $ΛΛ$ interaction. In this work, we investigate the $ΛΛ$ interaction within a Skyrme energy density functional framework based on the KIDS (Korea-IBS-Daegu-SKKU) models. We employ a Skyrme-type $ΛΛ$ interaction that includes the standard $s$- and $p$-wave terms, as well as a density-dependent term that effectively represents an $NΛΛ$ three-body force. The $s$-wave terms are constrained using data on double-$Λ$ hypernuclei supplemented by pseudodata obtained from core + $2Λ$ three-body model calculations including heavier hypernuclei. We show that the data on heavier systems are essential to simultaneously constrain the two $s$-wave parameters. We further explore the impact of the $p$-wave and $NΛΛ$ components on the neutron-star properties and find that appropriate repulsive contributions of these terms yield consistency with current neutron-star mass-radius observations. These results indicate that the present framework provides phenomenologically acceptable equations of state for dense $(N,Λ)$ matter over a wide range of densities and highlight the importance of future experimental data on heavier double-$Λ$ hypernuclei.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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