Hyperons in neutron stars

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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 2.08M<inf>⊙</inf>, which is consistent with the recently observed, massive neutron stars. We discuss a universal, repulsive three-body force for hyperons in matter.




Katayama, T., & Saito, K. (2015). Hyperons in neutron stars. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 747, 43–47. https://doi.org/10.1016/j.physletb.2015.03.039

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