Derivative expansion of quadratic operators in a general 't Hooft gauge
arXiv:hep-th/9906171 · doi:10.1103/PhysRevD.60.106001
Abstract
A derivative expansion technique is developed to compute functional determinants of quadratic operators, non diagonal in spacetime indices. This kind of operators arise in general 't Hooft gauge fixed Lagrangians. Elaborate applications of the developed derivative expansion are presented.
40 pages, to appear in Phys. Rev. D