Thursday, February 28, 2013

1204.2614 (D. L. Whittenbury et al.)

Neutron Star Properties with Hyperons    [PDF]

D. L. Whittenbury, J. D. Carroll, A. W. Thomas, K. Tsushima, J. R. Stone
In the light of the recent discovery of a neutron star with a mass accurately determined to be almost two solar masses, it has been suggested that hyperons cannot play a role in the equation of state of dense matter in $\beta$-equilibrium. We re-examine this issue in the most recent development of the quark-meson coupling model. Within a relativistic Hartree-Fock approach and including the full tensor structure at the vector-meson-baryon vertices, we find that not only must hyperons appear in matter at the densities relevant to such a massive star but that the maximum mass predicted is completely consistent with the observation.
View original: http://arxiv.org/abs/1204.2614

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