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Parton self-energies for general momentum-space anisotropy

机译:Parton自能用于一般动量空间各向异性

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We introduce an efficient general method for calculating the self-energies, collective modes, and dispersion relations of quarks and gluons in a momentum-anisotropic high-temperature quark-gluon plasma. The method introduced is applicable to the most general classes of deformed anisotropic momentum distributions and the resulting self-energies are expressed in terms of a series of hypergeometric basis functions which are valid in the entire complex phase-velocity plane. Comparing to direct numerical integration of the self-energies, the proposed method is orders of magnitude faster and provides results with similar or better accuracy. To extend previous studies and demonstrate the application of the proposed method, we present numerical results for the parton self-energies and dispersion relations of partonic collective excitations for the case of an ellipsoidal momentum-space anisotropy. Finally, we also present, for the first time, the gluon unstable mode growth rate for the case of an ellipsoidal momentum-space anisotropy.
机译:我们介绍了一种有效的通用方法,用于计算动量各向异性高温夸克-胶子等离子体中夸克和胶子的自能量,集体模态和色散关系。所介绍的方法适用于变形各向异性动量分布的最一般类别,并且所产生的自能量用一系列在整个复杂相速度平面内有效的超几何基函数表示。与自能量的直接数值积分相比,所提出的方法要快几个数量级,并且提供的结果具有相似或更好的精度。为了扩展以前的研究并证明所提出的方法的应用,在椭圆形动量空间各向异性的情况下,我们给出了关于单子集体能量的单子自能和色散关系的数值结果。最后,我们还首次提出了椭圆形动量空间各向异性情况下的胶子不稳定模增长率。

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