KINK MASS IN LIGHT-CONE QUANTIZATION

The equivalence of equal-time and light-cone quantisation is an open q uestion, in particular in the non-perturbative regime. We investigate this in a domain beyond the scope of weak coupling perturbation theory by investigating the scalar phi1+1(4)-model, which has non-perturbati ve classical kink solutions. Using stationary phase approximation for the light-cone path integral and properly taking into account the ligh t-cone constraints, we compute the quantum corrections to the kink mas s and find agreement with the result from equal-time quantisation.