Finding the Radiation Amplitude Zero in W Gamma Production-Is It Unique to the Standard Model?

Abstract

In the light of recent experimental observation of the Radiation Amplitude Zero (RAZ) in W γ production by CDF at Fermilab, we consider its consequences. Is the RAZ unique to the Standard Model (S.M.)? Although it is not forν e e − → W − γ, in the case of dū → W − γ, which is the case of experimental interest, observation of the RAZ implies that the S.M. must be correct.