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arXiv · 1103.2403

Effects of a weakly interacting light U boson on the nuclear equation of state and properties of neutron stars in relativistic models

Dong-Rui Zhang·Ping-Liang Yin·Wei Wang·Qi-Chao Wang·Wei-Zhou Jiang
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Abstract

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.

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Dong-Rui Zhang, Ping-Liang Yin, Wei Wang, Qi-Chao Wang, Wei-Zhou Jiang. 2011-03-12. Effects of a weakly interacting light U boson on the nuclear equation of state and properties of neutron stars in relativistic models. https://doi.org/10.1103/physrevc.83.035801

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