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arXiv 2602.22338hep-phhep-latnucl-th
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强子在胶子等离子体中的涨落-耗散关系

Fluctuation-Dissipation Relation for Hard Partons in a Gluonic Plasma

University of Regina(里贾纳大学);Wayne State University(韦恩州立大学);Bielefeld University(比勒费尔德大学);Technische Universität Darmstadt(达姆施塔特工业大学);Käthe-Kollwitz-Gymnasium(凯泽·科利维茨中学)

Amit Kumar, Abhijit Majumder, Ismail Soudi, Johannes Heinrich Weber

AI总结:

研究推导了高能轻夸克在胶子等离子体中阻力与扩散系数及热胶子凝聚态的涨落-耗散关系,通过局部算符和轮廓积分技术实现物理输运系数的联系。

摘要:

我们推导了一个涨落耗散关系,将高能轻夸克穿越非微扰热化胶子等离子体时的阻力和扩散输运系数联系起来。该硬夸克被假设接近壳上,其能量尺度参数上大于介质温度。我们为每个输运系数引入一个通用复值函数。在深度欧几里得动量区域评估这些函数,可以将其表示为局部算符。利用轮廓积分技术,我们将这些局部算符(在真空减去后)与沿分支割线附近轻偏振散的物理输运系数联系起来。推导出的关系将纵向阻力系数与纵向和横向扩散系数以及热胶子凝聚态联系起来。

英文摘要:

We derive a fluctuation dissipation relation connecting the drag and diffusion jet transport coefficients for an energetic light quark traversing a non-perturbative thermalized gluon plasma. The hard quark is taken to be close to on-shell, with an energy scale parametrically larger than the medium temperature. We introduce a general complex-valued function for each transport coefficient. Evaluating these in the deep Euclidean momentum region enables their expression in terms of local operators. Using contour-integration techniques, we relate these local operators, after vacuum subtraction, to the physical transport coefficients that arise along a branch cut, close to light-like dispersion. The derived relation relates the longitudinal drag coefficient to the longitudinal and transverse diffusion coefficients, and the thermal gluon condensate.

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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