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arXiv 2109.01749nucl-thastro-ph.HEhep-ph
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矢量相互作用抑制中子星中的夸克-强子混合相

Vector interactions inhibit quark-hadron mixed phases in neutron stars

G. Lugones, A. G. Grunfeld

摘要:

研究了具有矢量相互作用的MIT袋模型中夸克物质滴的表面张力$σ$和曲率能$γ$。利用多重反射展开(MRE)方法实现了对态密度的有限尺寸修正。我们发现,$σ$和$γ$强烈增强所产生的新的术语从载体相互作用。相对于非相互作用的情况,它们增加了一个大的因子,当矢量耦合常数$g$在文献中使用的范围内变化时,其可以高达$\sim 10$。这种行为可能会对推测存在于中子星(NS)内部的强子-夸克混合相产生重大影响,这种混合相可能会被完全抑制或其扩展范围大大减少。

英文摘要:

We investigate the surface tension $σ$ and the curvature energy $γ$ of quark matter drops in the MIT bag model with vector interactions. Finite size corrections to the density of states are implemented by using the multiple reflection expansion (MRE) formalism. We find that $σ$ and $γ$ are strongly enhanced by new terms arising from vector interactions. With respect to the noninteracting case they are increased by a large factor, which can be as high as $\sim 10$ when the vector coupling constant $g$ varies within the range used in the literature. This behavior may have major consequences for the hadron-quark mixed phase speculated to exist at neutron star (NS) interiors, which may be totally suppressed or have its extension substantially 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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