Standard Model Higher Order Corrections to the WW\gamma/WWZ Vertex

Abstract

Using the S--matrix pinch technique we obtain to one loop order gauge independent $\gamma W^{-}{W}^{+}$ and $Z{W}^{-}{W}^{+}$ vertices in the context of the standard model, with all incoming momenta off--shell. We show that the vertices so constructed satisfy simple QED--like Ward identities. These gauge invariant vertices give rise to expressions for the magnetic dipole and electric quadrupole form factors of the $W$ gauge boson, which, unlike previous treatments, satisfy the crucial properties of infrared finiteness and perturbative unitarity.

Comments: 12 pages Latex, uses revtex[aps,aipbook,floats]. To appear in the proceedings of the International Symposium on Vector Boson Self Interactions, February 1-3, 1995 UCLA, Los Angeles California, USA