发表机构
University of Helsinki; University of Turku（赫尔辛基大学; 图尔库大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文首次计算了致密夸克物质中非轻子弱味平衡速率的前导微扰QCD修正，基于Kadanoff-Baym方程和实时热场论，修正有限且规范不变，低温下使树级速率增强30%-40%，为体粘滞计算提供更精确输入。
AI 中文摘要
我们首次计算了致密夸克物质中非轻子弱味平衡速率的前导微扰量子色动力学（QCD）修正。该计算基于Kadanoff-Baym动力学方程，并采用实时热场论进行。所得的QCD修正既是规范不变的，又是完全有限的。特别是，在结合实部和虚部修正后，所有软发散和共线发散均相互抵消，这符合Kinoshita-Lee-Nauenberg定理。在与致密星动力学相关的低温区域，该修正使树级速率在高密度范围内（微扰QCD适用的区域）增强了30%至40%。修正后的速率改进了三十多年来唯象计算中使用的树级结果，为致密夸克物质中的体粘滞计算提供了更精确的微观输入。
英文摘要
We present the first calculation of the leading perturbative quantum chromodynamics (QCD) correction to the nonleptonic weak flavor-equilibration rate in dense quark matter. The computation is based on the Kadanoff-Baym kinetic equation and performed using real-time thermal field theory. The resulting QCD correction is both gauge invariant and fully finite. In particular, all soft and collinear divergences cancel after combining real and virtual corrections, in accordance with the Kinoshita-Lee-Nauenberg theorem. In the low-temperature regime relevant to compact-star dynamics, the correction enhances the tree-level rate by $30 - 40\%$ over the high-density range where perturbative QCD is applicable. The corrected rate improves on the tree-level result used in phenomenological calculations for more than three decades, providing a more accurate microscopic input for bulk-viscosity calculations in dense quark matter.
Comments5 pages, 3 figures
