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arxiv: 1501.05419 · v1 · pith:KFFPSQR4new · submitted 2015-01-22 · ⚛️ nucl-th · astro-ph.SR· hep-ph

Hyperons in neutron stars

classification ⚛️ nucl-th astro-ph.SRhep-ph
keywords hyperonsbaryonsmatterneutronneutron-starstarsaccountapproach
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Using the Dirac-Brueckner-Hartree-Fock approach, the properties of neutron-star matter including hyperons are investigated. In the calculation, we consider both time and space components of the vector self-energies of baryons as well as the scalar ones. Furthermore, the effect of negative-energy states of baryons is partly taken into account. We obtain the maximum neutron-star mass of $2.08\,M_{\odot}$, which is consistent with the recently observed, massive neutron stars. We discuss a universal, repulsive three-body force for hyperons in matter.

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