TL;DR
This paper investigates the properties of neutron-star matter including hyperons using a sophisticated theoretical approach, finding a maximum neutron-star mass consistent with recent observations and discussing hyperon interactions.
Contribution
It applies the Dirac-Brueckner-Hartree-Fock method to include hyperons and negative-energy states, providing new insights into neutron star mass limits and hyperon forces.
Findings
Maximum neutron-star mass of 2.08 solar masses
Inclusion of hyperons affects neutron star properties
Discussion of repulsive three-body hyperon forces
Abstract
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 , 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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