\midheading{$\nu_{e} e^+ \nu_{\mu} \mu^+ $-pair production via WBF, processes 228,2281}
The {\it weak} process ({\tt nproc=228})  occurs in $O(\alpha^6)$,
whereas the {\it strong} process occurs ({\tt nproc=2281}) in $O(\alpha^4 \alpha_S^2)$.
These processes can currently only be calculated at lowest order.
\begin{eqnarray}
&228  &  f(p_1)+f(p_2) \to W^+(\nu_e(p_3),e^+(p_4)))W^+(\nu_\mu(p_5),\mu^+(p_6))+f(p_7)+f(p_8) [WBF] \nonumber \\
&2281 &  f(p_1)+f(p_2) \to W^+(\nu_e(p_3),e^+(p_4)))W^+(\nu_\mu(p_5),\mu^+(p_6))+f(p_7)+f(p_8) [strong]     \nonumber
\end{eqnarray}