Weak boson production amplitude zeros; equalities of the helicity amplitudes

Abstract

We investigate the radiation amplitude zeros exhibited by many standard model amplitudes for triple weak gauge boson production processes. We show that $\mathrm{WZ}\ensuremath{\gamma}$ production amplitudes have an especially rich structure in terms of zeros; these amplitudes have zeros originating from several different sources. It is also shown that the type-I current null zone is the special case of the equality of the specific helicity amplitudes.