Renormalization in a Landau to Coulomb interpolating gauge in Yang-Mills theory
arXiv:2103.01683 · doi:10.1016/j.aop.2021.168551
Abstract
The Coulomb gauge in QCD is the only explicitly unitary gauge. But it suffers from energy-divergences which means that it is not rigorously well-defined. One way to define it unambiguously is as the limit of a gauge interpolating between the Landau gauge and the Coulomb gauge. This interpolating gauge is characterised by a parameter theta and the Coulomb gauge is obtained in the limit theta tends to zero. We study the renormalization of this theta-gauge for all values of theta, and note some special features of it.
11 pages, 1 figure