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Three-body couplings in RMF and its effects on hyperonic star equation of state
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We develop a new relativistic mean field (RMF) model including explicit three-body couplings and apply it to hyperonic systems and neutron star matter. The recent observation of the massive mass neutron star has given us a puzzle; when strange hadrons including hyperons are taken into account, the equation of state (EOS) becomes too soft to support the observed two-solar-mass neutron star. Three-baryon repulsion is a promising ingredient to answer this puzzle. We demonstrate that it is possible to consistently explain the massive neutron star and hypernuclear data when we include three-body couplings and modify the hyperon vector couplings from the flavor SU(3) values.
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Cited by 1 Pith paper
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Properties of a kaon-condensed phase in hyperon-mixed matter with three-baryon forces
A model with kaon condensates, hyperons, and universal three-baryon repulsion produces neutron star masses up to 2.2 solar masses, consistent with massive pulsar observations.
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