A study of hyperons in nuclear matter based on chiral effective field theory

Abstract

The in-medium properties of a hyperon-nucleon potential, derived within chiral effective field theory and fitted to Lambda-N and Sigma-N scattering data, are investigated. Results for the single-particle potentials of the Lambda and Sigma hyperons in nuclear matter are reported, based on a conventional first-order Brueckner calculation. The Sigma-nucleus potential is found to be repulsive, in agreement with phenomenological information. A weak Lambda-nucleus spin-orbit interaction can be achieved by an appropriate adjustment of a low-energy constant corresponding to an antisymmetric Lambda-N -- Sigma-N spin-orbit interaction that arises at next-to-leading order in the effective field theory approach.

12 pages, 2 figures; several references added, several typos corrected

References in corpus (14)

• In-medium nuclear interactions of low-energy hadrons
• Hyperon-nucleon interactions - a chiral effective field theory approach
• Baryon-baryon interactions in the SU6 quark model and their applications to light nuclear systems
• Extended-soft-core Baryon-Baryon Model II. Hyperon-Nucleon Interaction
• Strangeness nuclear physics: a critical review on selected topics
• Semiclassical Distorted Wave Model Analysis of the $({\pi }^{-},K^{+})$ $\Sigma$ Formation Inclusive Spectrum
• The hyperon-nucleon interaction: conventional versus effective field theory approach
• Strangeness nuclear physics - 2010
• Note on spin-orbit interactions in nuclei and hypernuclei
• Chiral dynamics of $\Sigma$-hyperons in the nuclear medium
• $\Sigma$-nuclear spin-orbit coupling from two-pion exchange
• P-wave Lambda N - Sigma N coupling and the spin-orbit splitting of 9 Lambda Be
• The baryon-decuplet in the chiral dynamics of Lambda-hyperons in nuclear matter
• Predicting the Lambda binding energy in nuclear matter