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arXiv · 2509.24459

Properties of hyperons in nuclear matter from chiral hyperon-nucleon interactions at next-to-next-to-leading order

Asanosuke Jinno·Johann Haidenbauer·Ulf-G. Meißner
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Abstract

The $Λ$ and $Σ$ single-particle potentials in infinite nuclear matter are analyzed within a recently established chiral hyperon-nucleon ($YN$) interaction up to N$^2$LO in combination with an nucleon-nucleon interaction derived in the same scheme. The self-consistent Brueckner-Hartree-Fock method with the continuous choice of the single-particle potential is employed. It is found that the $Λ$ single-particle potential is comparable to the results achieved with the NLO $YN$ interaction from 2019. The resulting $Σ$ potential becomes more attractive compared to the previous NLO results due to the constraint from the recent $ΣN$ differential cross section data measured in the J-PARC E40 experiment. An estimate of the theoretical uncertainty of the single-particle potentials is provided in terms of the truncation error in the chiral expansion.

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Asanosuke Jinno, Johann Haidenbauer, Ulf-G. Meißner. 2025-12-24. Properties of hyperons in nuclear matter from chiral hyperon-nucleon interactions at next-to-next-to-leading order. https://doi.org/10.1103/vs4h-p3zh

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