光锥规范下的quark gap方程
高能物理 - 唯象学
2025-10-21 v2 核理论
摘要
我们计算了在光锥规范下对quark自能修正的贡献,这是受分布态(distribution amplitudes)驱动的计算。后者隐含Wilson线,其作用是保持 hadronic 振幅的规范不变性,在光锥规范下该Wilson线变为平凡。因此,在光锥规范下,分布态的计算显著简化,前提是波函数和传播子以该规范获得。在本文中,我们探讨了在其主导截断下并以来自Wilson标度恒等式导出的dressed vertex的条件下,对相应的Dyson-Schwinger方程进行计算。quark的质量和波函数重整化函数,以及第三个复数振幅,均发现取决于quark动量与光锥四矢量之间的相对取向,这表明传播子存在几何规范依赖性。
引用
@article{arxiv.2411.00106,
title = {The quark gap equation in light-cone gauge},
author = {Roberto Correa da Silveira and Fernando E. Serna and Bruno El-Bennich},
journal= {arXiv preprint arXiv:2411.00106},
year = {2025}
}
备注
Accepted for publication in PRD. An improved numerical treatment of divergences that occur in the C functions and use of the Cornwall gluon propagator derived in pinch technique lead to revised numerical results. In particular, the C functions in Figs. 3 and 6 are very small or consistent with zero depending on the frame of the quark. The conclusions are barely modified