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Hyperons in nuclear matter from SU(3) chiral effective field theory

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arxiv 1507.08808 v2 pith:LWNYEZGS submitted 2015-07-31 nucl-th

S. Petschauer , J. Haidenbauer , N. Kaiser , Ulf-G. Mei{ss}ner , W. Weise This is my paper · ORCID
classification nucl-th
keywords theorychiraleffectivefieldhyperonsmatternuclearinteraction
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Brueckner theory is used to investigate the properties of hyperons in nuclear matter. The hyperon-nucleon interaction is taken from chiral effective field theory at next-to-leading order with SU(3) symmetric low-energy constants. Furthermore, the underlying nucleon-nucleon interaction is also derived within chiral effective field theory. We present the single-particle potentials of Lambda and Sigma hyperons in symmetric and asymmetric nuclear matter computed with the continuous choice for intermediate spectra. The results are in good agreement with the empirical information. In particular, our calculation gives a repulsive Sigma-nuclear potential and a weak Lambda-nuclear spin-orbit force.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quarkyonic Stars with Strangeness

    nucl-th 2026-07 conditional novelty 6.0 of 10

    A three-flavor quarkyonic model with octet baryons yields stiffer neutron-star EOS and raises maximum masses, potentially resolving the hyperon puzzle.

  2. In-medium $\Lambda N$ interactions with leading order covariant chiral hyperon/nucleon-nucleon forces

    nucl-th 2025-01 conditional novelty 6.0 of 10

    A relativistic Brueckner-Hartree-Fock calculation with leading-order covariant chiral hyperon-nucleon and nucleon-nucleon forces reproduces the empirical Lambda single-particle potential in nuclear matter.

  3. Neutron Star Properties and Femtoscopic Constraints

    nucl-th 2024-12 conditional novelty 5.0 of 10

    Hyperon interactions tuned to femtoscopic data still yield neutron star maximum masses of only 1.3-1.4 solar masses, leaving the hyperon puzzle unresolved.

  4. $\Lambda$ and $\Sigma$ potentials in neutron stars, hypernuclei, and heavy-ion collisions

    nucl-th 2025-01 conditional novelty 4.0 of 10

    Certain three-baryon force parameters that make Lambda hyperons repulsive at high density also reproduce the empirical Sigma potential and existing hypernuclear and heavy-ion data.

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