Exact Calculation offf→ffWWfor the Charged-Current Sector and Comparison with the Effective-WApproximation

Abstract

We have computed the complete set of amplitudes for fermion + fermion into fermion + fermion $+W^{+}+W^{-}$ for all possible fermion types. We use these results to analyze the phenomenology of the $\mathrm{WW}$ scattering sector and to compare to the effective $W$ approximation.