U_e(1)--covariant R_ξ--gauge for the two Higgs doublet model

C. G. Honorato, J. J. Toscano

An $U_e(1)$--covariant $R_{\xi }$ gauge for the two Higgs doublet model based in the BRST symmetry is introduced. This gauge allows one to remove an important number of nonphysical vert…