期刊
PHYSICS LETTERS B
卷 709, 期 3, 页码 242-246出版社
ELSEVIER
DOI: 10.1016/j.physletb.2012.02.009
关键词
Neutron stars; Equation of state; Quark-meson coupling model; Relativistic Hartree-Fock calculation; Tensor interaction
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 similar to 2.0M(circle dot), which is consistent with the recently observed, precise mass, 1.97 +/- 0.04M(circle dot). 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. (C) 2012 Elsevier B.V. All rights reserved.
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