Effects of Fock term, tensor coupling and baryon structure variation on a neutron star

Дата и время публикации : 2011-10-18T03:58:29Z

Авторы публикации и институты :
Tsuyoshi Miyatsu
Tetsuya Katayama
Koichi Saito

Ссылка на журнал-издание: Phys. Lett. B709, 242 (2012)
Коментарии к cтатье: 12 pages, 3 figures
Первичная категория: nucl-th

Все категории : nucl-th, astro-ph.SR, hep-ph, nucl-ex

Краткий обзор статьи: 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, $1.97pm0.04 M_{odot}$. 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.

Category: Physics