Some properties of green's functions in the non-linear Rξ gauge

Abstract

In the non-linear Rξ gauge, the W− boson field satisfies the naive Ward identity and in consequence one-loop contributions give zero neutrino charge, which they do not in the conventional Rξ gauge. Further, in this non-linear gauge, the separate diagrams contributing to the photon self-energy are transverse and their divergent parts gauge independent.