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arXiv 1302.4833nucl-th
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用相对论平均场模型研究中子星中的反K介子

Antikaons in neutron star studied with recent versions of relativistic mean-field models

Neha Gupta, P. Arumugam

摘要:

我们研究了相对论平均场(RMF)模型中附加耦合与反K介子凝聚对各种中子星性质的影响。分析了介质中反K子和核子的有效质量、反K子能量、化学势以及中子星的质量-半径关系等性质。我们用RMF(NL 3),E-RMF(G1,G2)和FSU 2.1模型计算了NS性质,这些模型在解释几种有限核性质方面是相当成功的。我们的结果表明,NS中K介子凝聚的发生强烈地依赖于拉格朗日量的参数,特别是在反K介子主导状态方程行为的高密度下,附加耦合起着重要的作用。

英文摘要:

We study the impact of additional couplings in the relativistic mean field (RMF) models, in conjunction with antikaon condensation, on various neutron star properties. We analyze different properties such as in-medium antikaon and nucleon effective masses, antikaon energies, chemical potentials and the mass-radius relations of neutron star (NS). We calculate the NS properties with the RMF (NL3), E-RMF (G1, G2) and FSU2.1 models, which are quite successful in explaining several finite nuclear properties. Our results show that the onset of kaon condensation in NS strongly depends on the parameters of the Lagrangian, especially the additional couplings which play a significant role at higher densities where antikaons dominate the behavior of equation of state.

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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