Renormalization group running in the symmetric and the broken symmetry phases of the R _ξ and the $\overline {R_\xi }$ gauges

Abstract

We investigate the renormalization group (RG) running of the effective potential and the pole mass in the broken symmetry phase of the R _ξ and the $\overline {R_\xi }$ gauges which have different RG running for the effective potential in the symmetric phase and show that if the vacuum expectation value (VEV) is expressed as a function of the other parameters of the theory by solving the minimization condition, then the effective potential in the broken symmetry phase in both gauges satisfies the same RG equation as one in the symmetric phase of the $\overline {R_\xi }$ gauge. The pole masses in the broken symmetry phase of both gauges are RG invariant with respect to the RG funtions of the symmetric phase and are shown to be the same at one-loop order.