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

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 derive...

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Bibliographic Details
Published in:arXiv.org 2016-01
Main Authors: Petschauer, S, Haidenbauer, J, Kaiser, N, Ulf-G Meißner, Weise, W
Format: Article
Language:English
Subjects:
Field theory
Gluons
Hyperons
Magnetic fields
Nuclear matter
Nuclear potential
Nuclear spin
Nucleon-nucleon interactions
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1507.08808