Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-10-18
Physics
Nuclear Physics
Nuclear Theory
12 pages, 3 figures
Scientific paper
The equation of state for neutron matter is calculated within relativistic Hartree-Fock approximation. The tensor couplings of vector mesons to baryons are included, and the change of baryon internal structure in matter is also considered using the quark-meson coupling model. We obtain the maximum neutron-star mass of $\sim 2.0 M_\odot$, which is consistent with the recently observed, precise mass, $1.97\pm0.04 M_{\odot}$. The Fock contribution is very important and, in particular, the inclusion of tensor coupling is vital to obtain such large mass. The baryon structure variation in matter also enhances the mass of a neutron star.
Katayama Tetsuya
Miyatsu Tsuyoshi
Saito Koichi
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