Strange nuclear matter within Brueckner-Hartree-Fock theory - art. no. 025802

We have developed a formalism for microscopic Brueckner-type calculations o f dense nuclear matter that includes all types of baryon-baryon interaction s and allows us to treat any asymmetry in the fractions of the different sp ecies (n, p, Lambda, Sigma(-), Sigma(0), Sigma(+), Xi(-), and Xi(0)). We pr esent results for the different single-particle potentials, focusing on sit uations that can be relevant in future microscopic studies of beta-stable n eutron star matter with strangeness. We find that both the hyperon-nucleon and hyperon-hyperon interactions play a non-negligible role in determining the chemical potentials of the different species.