$W\gamma \gamma$ Production at the Fermilab Tevatron Collider: Gauge Invariance and Radiation Amplitude Zero

U. Baur, T. Han, N. Kauer +2

The electroweak process $p\bar{p}\to {\ell }^{\pm }\nu \gamma \gamma$ is calculated at tree level, including finite W width effects. In order to obtain a gauge invariant amplitude, the imaginary parts…