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arXiv 1801.01700nucl-th
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有效逸度准粒子模型的协变动力学理论和热QCD物质的一级输运系数

Covariant kinetic theory for effective fugacity quasi particle model and first order transport coefficients for hot QCD matter

Sukanya Mitra, Vinod Chandra

摘要:

在热QCD介质的准粒子描述下,在有限温度和重子化学势下,建立了夸克、反夸克和胶子相互作用系统的有效相对论动力学理论,其中相互作用用胶子和夸克的有效逸度来编码,具有非平凡的能量色散.应力-能量张量和数流的局部守恒要求在输运方程中引入平均场项,该项对一阶输运系数产生非零贡献。这种贡献对于接近QCD跃迁温度的温度是显著的,然而,超过跃迁温度的几倍的贡献可以忽略不计。作为一个暗示,平均场的贡献的影响的剪切粘度,体粘度和热导率的温度依赖性的热QCD介质中存在的二元,弹性碰撞的成分,已被调查。可见的效果已被观察到的温度制度接近QCD转变温度。

英文摘要:

An effective relativistic kinetic theory has been constructed for an interacting system of quarks, anti-quarks and gluons within a quasi-particle description of hot QCD medium at finite temperature and baryon chemical potential, where the interactions are encoded in the gluon and quark effective fugacities with non-trivial energy dispersions. The local conservations of stress-energy tensor and number current require the introduction of a mean field term in the transport equation which produces non-vanishing contribution to the first order transport coefficients. Such contribution has been observed to be significant for the temperatures which are closer to the QCD transition tem- perature, however, induces negligible contributions beyond a few times the transition temperature. As an implication, impact of the mean field contribution on the the temperature dependence of the shear viscosity, bulk viscosity and thermal conductivity of a hot QCD medium in the presence of binary, elastic collisions among the constituents, has been investigated. Visible effects have been observed for the temperature regime closer to the QCD transition temperature.

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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