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arXiv 0910.5334hep-phnucl-th
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真空涨落对超声波中子星物质的影响

Vacuum fluctuation effects on hyperonic neutron star matter

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

摘要:

在相对论平均场(RMF)理论框架下研究了真空涨落(VF)对超声波中子星物质性质的影响。VF修正导致了介质中重子和介子质量的密度依赖性。我们比较了采用三种介子-超子耦合所得到的结果。超子修正和VF修正的引入软化了超子中子星物质的状态方程,从而降低了超子中子星的质量。$δ$场的存在扩大了超声波中子星的质量和半径。考虑到介子-超子耦合的不确定性,得到的超子中子星的最大质量在$1.33M_{\odot}\sim1.55M_{\odot}$范围内。

英文摘要:

The vacuum fluctuation (VF) effects on the properties of the hyperonic neutron star matter are investigated in the framework of the relativistic mean field (RMF) theory. The VF corrections result in the density dependence of in-medium baryon and meson masses. We compare our results obtained by adopting three kinds of meson-hyperon couplings. The introduction of both hyperons and VF corrections soften the equation of state (EoS) for the hyperonic neutron star matter and hence reduce hyperonic neutron star masses. The presence of the $δ$ field enlarges the masses and radii of hyperonic neutron stars. Taking into account the uncertainty of meson-hyperon couplings, the obtained maximum masses of hyperonic neutron stars are in the range of $1.33M_{\odot}\sim1.55M_{\odot}$.

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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