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arXiv 2602.04281nucl-th
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基于楚尔有效场论的核物质中超子单粒子势

Hyperon single-particle potentials in nuclear matter based on baryon-baryon interactions derived within chiral effective field theory

Kyoto University(京都大学)

Asanosuke Jinno, Johann Haidenbauer, Ulf-G. Meißner

AI总结:

本文基于楚尔有效场论推导出的YN相互作用,研究了核物质中Λ和Σ单粒子势,并揭示了新数据对Σ单粒子势吸引性的影响。

摘要:

本文基于楚尔有效场论直至次次领先阶(N$^2$LO)推导出的YN相互作用,分析了Λ和Σ单粒子势。在连续选择单粒子势的情况下,采用了自洽的布里渊-海特-福克框架。Λ单粒子势的结果与之前次领先阶(NLO)的楚尔YN相互作用结果相比较。Σ单粒子势被发现是弱吸引的,与之前弱排斥的结果相反,反映了最近J-PARC E40数据对Σ$^+$p散射的新约束。还提供了单粒子势理论不确定性的估计。

英文摘要:

An analysis of the Lambda and Sigma single-particle potentials is presented, based on YN interactions derived within chiral effective field theory up to next-to-next-to-leading order (N$^2$LO). The self-consistent Brueckner-Hartree-Fock framework is employed within the continuous choice for the single-particle potential. The result for the Lambda single-particle potential is comparable to the ones obtained with previous chiral YN interactions up to next-to-leading order (NLO). The Sigma single-particle potential is found weakly attractive, in contrast to earlier weakly repulsive results, reflecting new constraints from the recent J-PARC E40 data on $Σ^+p$ scattering. An estimate of the theoretical uncertainty of the single-particle potentials is provided.

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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