Strange nuclear matter within Brueckner-Hartree-Fock Theory

Abstract

We have developed a formalism for microscopic Brueckner-type calculations of dense nuclear matter that includes all types of baryon-baryon interactions and allows to treat any asymmetry on the fractions of the different species (n, p, $\Lambda$, ${\Sigma }^0$, ${\Sigma }^{+}$, ${\Sigma }^{-}$, ${\Xi }^{-}$ and ${\Xi }^0$). We present results for the different single-particle potentials focussing on situations that can be relevant in future microscopic studies of beta-stable neutron star matter with strangeness. We find the both the hyperon-nucleon and hyperon-hyperon interactions play a non-negligible role in determining the chemical potentials of the different species.

36 pages, LateX, includes 8 PostScript figures, (submitted to PRC)

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