Effects of $\Lambda$ hyperons on the nuclear equation of state in a Dirac-Brueckner-Hartree-Fock model

Abstract

We predict the energy per baryon in nuclear matter with non-zero fraction of $\Lambda$ hyperons. We include Dirac effects on the nucleons as well as the $\Lambda$ and describe how the latter is implemented. We use the nucleon-hyperon meson-exchange potentials from the Juelich group, the latest as well as an earlier version. The dependence of the results on the many-body framework and on the nucleon-hyperon interaction model is discussed.

12 pages, 3 figures. Accepted for publication in Physical Review C

References in corpus (3)

• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
• Hyperon-nucleon single-particle potentials with low-momentum interactions
• Strange two-baryon interactions using chiral effective field theory

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• Transport coefficients of hyperonic neutron star cores
• Equation of state for hyperonic neutron-star matter in SU(3) flavor symmetry