Sum rules for $e^{+}{e}^{-}\to W^{+}{W}^{-}$ helicity amplitudes from BRS invariance

Sher Alam, Kaoru Hagiwara, Shinya Kanemura +2

The BRS invariance of the electroweak gauge theory leads to relationships between amplitudes with external massive gauge bosons and amplitudes where some of these gauge bosons are…