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arXiv 2103.05658hep-phnucl-th
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冷夸克物质中的软相互作用

Soft interactions in cold quark matter

Tyler Gorda, Aleksi Kurkela, Risto Paatelainen, Saga Säppi, Aleksi Vuorinen

摘要:

零温度、高密度夸克物质的热力学性质的准确知识在试图约束中子星核心内发现的致密QCD物质的行为时起着不可或缺的作用,而不管恒星内部实现的相位如何。在这封信中,我们考虑了稠密QCD状态方程的弱耦合展开,并计算了长波长动态屏蔽胶子场之间的非阿贝尔相互作用所产生的次-首阶贡献。考虑到这些相互作用,需要一个全回路重新计算,这可以使用硬热回路(HTL)运动学近似。具体而言,我们使用HTL有效理论进行了完整的双回路计算,该理论适用于长波长或软模式。我们发现,软部门内的冷夸克物质表现良好,相反,在高温下遇到的情况下,并发现新的贡献降低了重正化尺度的依赖性的状态方程在高密度。

英文摘要:

Accurate knowledge of the thermodynamic properties of zero-temperature, high-density quark matter plays an integral role in attempts to constrain the behavior of the dense QCD matter found inside neutron-star cores, irrespective of the phase realized inside the stars. In this Letter, we consider the weak-coupling expansion of the dense QCD equation of state and compute the next-to-next-to-next-to-leading-order contribution arising from the non-Abelian interactions among long-wavelength, dynamically screened gluonic fields. Accounting for these interactions requires an all-loop resummation, which can be performed using hard-thermal-loop (HTL) kinematic approximations. Concretely, we perform a full two-loop computation using the HTL effective theory, valid for the long-wavelength, or soft, modes. We find that the soft sector is well-behaved within cold quark matter, contrary to the case encountered at high temperatures, and find that the new contribution decreases the renormalization-scale dependence of the equation of state at high density.

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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