Three-body couplings in RMF and its effects on hyperonic star equation of state
Nuclear Theory
2015-06-12 v2
Abstract
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.
Keywords
Cite
@article{arxiv.1211.7208,
title = {Three-body couplings in RMF and its effects on hyperonic star equation of state},
author = {Kohsuke Tsubakihara and Akira Ohnishi},
journal= {arXiv preprint arXiv:1211.7208},
year = {2015}
}
Comments
4 pages, 6 figures, HYP2012 proceedings