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arXiv 1111.7279hep-phhep-th
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库仑规范中的首阶QCD

Leading order QCD in Coulomb gauge

Peter Watson, Hugo Reinhardt

摘要:

库仑规范量子色动力学在一阶形式下可以写成一个无鬼的、非定域的作用量,通过高斯定律确保色荷守恒。将非定域项(库仑核)用其期望值代替作一个近似,就可以导出Dyson-Schwinger方程。通过高阶截断,这些方程简化为静态胶子和夸克传播子的能隙方程,这些能隙方程是从准粒子近似到正则哈密顿近似得到的。此外,可以建立与重夸克极限的联系,从而可以直观地解释电荷约束和红外发散。

英文摘要:

Coulomb gauge QCD in the first order formalism can be written in terms of a ghost-free, nonlocal action that ensures total color charge conservation via Gauss' law. Making an Ansatz whereby the nonlocal term (the Coulomb kernel) is replaced by its expectation value, the resulting Dyson-Schwinger equations can be derived. With a leading order truncation, these equations reduce to the gap equations for the static gluon and quark propagators obtained from a quasi-particle approximation to the canonical Hamiltonian approach. Moreover a connection to the heavy quark limit can be established, allowing an intuitive explanation for the charge constraint and infrared divergences.

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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