Wmagnetic moment in electroweak mixing and composite models and radiation zeros inqjq¯j→Wγ

The same experimental and theoretical constraints that are used to set limits on the masses of the weak bosons in the composite-model versions of electroweak mixing models are used to bound the magnetic-moment parameter of the $W$. We find in general electroweak mixing schemes, ones with additional heavy isospin-1 bosons ($W^{\prime }$), that off-diagonal weak-boson electromagnetic interactions ($W{W}^{\prime }\gamma$ vertices) are allowed. The cross section for the process $q_i{\overline{q}}_j\to W\gamma$, which has been suggested as the best way to measure the $W$ moments, is generalized to include the effects of these off-diagonal couplings as well as arbitrary and independent $W$ magnetic dipole and electric quadrupole moments.