of the very small branching ratios ($BR$),

$$\begin{aligned}
BR(Z^0Z^0 \rightarrow l \bar{l} l'\bar{l'}) & = & 0.0044   \\
BR(W^{\pm}Z^0 \rightarrow l {\nu}_{l} l'\bar{l'}) & = & 0.013\end{aligned}$$

these are the most interesting events since they are much easier to detect than the hadronic channels.

On the other hand, we will assume that it is not possible to detect experimentally the different polarizations of the gauge bosons in the final state. Therefore we have to include in our computations all the $Z^0$ or $W^{\pm}$ gauge bosons, either transversally or longitudinally polarized. As it was mentioned in the introduction, instead of using the $ET$ to calculate the collisions of the weak bosons, as it is usually done, we have computed the amplitudes with gauge bosons as initial and final states and then projected them in all their polarizations. Thus, as we are not going to apply the $ET$ we only consider the maximal bound on the energy required for the applicability of the chiral Lagrangian formalism, but we do not have any low energy bound. In this way we can take into account the influence of the chiral lagrangian parameters in all the gauge bosons polarization channels and not only in the 