Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-03-12
Phys.Rev.C83:035801,2011
Physics
Nuclear Physics
Nuclear Theory
8 pages,7 figures
Scientific paper
10.1103/PhysRevC.83.035801
We investigate the effects of the light vector U-boson that couples weakly to nucleons in relativistic mean-field models on the equation of state and subsequently the consequence in neutron stars. It is analyzed that the U-boson can lead to a much clearer rise of the neutron star maximum mass in models with the much softer equation of state. The inclusion of the U-boson may thus allow the existence of the non-nucleonic degrees of freedom in the interior of large mass neutron stars initiated with the favorably soft EOS of normal nuclear matter. In addition, the sensitive role of the U-boson in the neutron star radius and its relation to the test of the non-Newtonian gravity that is herein addressed by the light U-boson are discussed.
Jiang Wei-Zhou
Wang Qi-Chao
Wang Wei
Yin Ping-Liang
Zhang Dong-Rui
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