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

Effects of a weakly interacting light U boson on the nuclear equation of state and properties of neutron stars in relativistic models
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弱相互作用轻 U 玻色子对相对论模型中中子星核状态方程和性质的影响

DOI:
10.1103/physrevc.83.035801
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发表时间:
2011-03
期刊:
Physical Review C (nuclear Physics)
影响因子:
--
通讯作者:
Wei-Zhou Jiang
Wei-Zhou Jiang
中科院分区:
其他
文献类型:
--
作者:
Dong-Rui Zhang;, Ping-Liang Yin;, Wei Wang;Qi-Chao Wang;Wei-Zhou Jiang

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我们研究了相对论平均场模型中与核子弱耦合的光矢量U玻色子对状态方程的影响以及中子星中的结果。分析表明,在状态方程较软的模型中,U玻色子可以使中子星的最大质量增加得更明显。因此,U玻色子的加入可能会允许大质量中子星内部存在非核子自由度,这些中子星是由正常核物质的软状态方程启动的。此外,还讨论了U玻色子在中子星半径中的敏感作用及其与由轻U玻色子所涉及的非牛顿引力测试的关系。
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.
具有手性极限的相对论平均场模型中同位旋不对称核物质的状态方程
DOI: 10.1016/j.physletb.2007.08.004
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