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arXiv 1709.03598nucl-thhep-ph
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非平衡态夸克-胶子等离子体的光子发射

Photon emission from quark-gluon plasma out of equilibrium

Sigtryggur Hauksson, Sangyong Jeon, Charles Gale

摘要:

分析了非平衡夸克-胶子等离子体(QGP)的光子发射。我们推导出一个积分方程,描述通过夸克-反夸克湮灭和夸克韧致辐射的光子产生。它包括不同散射点之间的相干性,也称为Landau-Pomeranchuk-Migdal效应。这些领先的顺序过程一起研究的第一次在一个不平衡场的理论处理,使列入粘性修正电磁发射率的计算。在各向同性、粘性等离子体的特殊情况下,积分方程仅取决于三个常数,这三个常数捕获了介质的非平衡性质。

英文摘要:

The photon emission from a non-equilibrium quark-gluon plasma (QGP) is analyzed. We derive an integral equation that describes photon production through quark-antiquark annihilation and quark bremsstrahlung. It includes coherence between different scattering sites, also known as the Landau-Pomeranchuk-Migdal effect. These leading-order processes are studied for the first time together in an out-of-equilibrium field theoretical treatment that enables the inclusion of viscous corrections to the calculation of electromagnetic emission rates. In the special case of an isotropic, viscous, plasma the integral equation only depends on three constants which capture the non-equilibrium nature of the medium.

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