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arXiv 0910.3434hep-phnucl-th
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真空涨落对非对称核物质的影响

Vacuum fluctuation effects on asymmetric nuclear matter

X. -H. Guo, B. Liu, M. -H. Weng

摘要:

研究了真空涨落对非对称核物质的影响。通过计算环图修正,修正了核介质中核子和介子的质量,得到了强子质量与密度的关系。在相对论平均场(RMF)方法框架下,采用等矢量标量$δ$介子的相对论拉格朗日密度计算了核物质状态方程,最后研究了介质中强子质量对中子星性质的影响.加入VF修正后,核物态方程变得更软,中子星质量减小。

英文摘要:

The vacuum fluctuation (VF) effects on asymmetric nuclear matter are investigated. Masses of nucleons and mesons are modified in the nuclear medium by calculating the loop-diagram corrections and the density dependence of hadron masses is obtained. The relativistic Lagrangian density with the isovector scalar $δ$ meson is used to calculate the nuclear equation of state (EOS) in the framework of the relativistic mean-field (RMF) approach, the effects of the in-medium hadron masses on the properties of neutron stars are finally studied. With the inclusion of the VF corrections, the nuclear EOS becomes softer and the neutron star masses are reduced.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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