Properties of hyperons in nuclear matter from chiral hyperon-nucleon interactions at next-to-next-to-leading order
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| Main Authors: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914218192666624 |
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| author | Jinno, Asanosuke Haidenbauer, Johann Meißner, Ulf-G. |
| author_facet | Jinno, Asanosuke Haidenbauer, Johann Meißner, Ulf-G. |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_24459 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Properties of hyperons in nuclear matter from chiral hyperon-nucleon interactions at next-to-next-to-leading order Jinno, Asanosuke Haidenbauer, Johann Meißner, Ulf-G. Nuclear Theory 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. |
| title | Properties of hyperons in nuclear matter from chiral hyperon-nucleon interactions at next-to-next-to-leading order |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2509.24459 |