\begin{table}[hhh]
\begin{center}
\begin{tabular}{|c|c|c|} \hline
 &  Electron Channel &  Muon Channel\\
 \hline \hline
Data & 0  & 0 \\ \hline \hline
$W$ production & $ 0.63 \pm 0.19$  &$  0.23 \pm 0.05$ \\ \hline
Charged Current & $0.08 \pm 0.02$ &  $ 0.01 \pm 0.01$ \\ \hline
Neutral Current & $ 0.22 \pm 0.05$ & $ 0.03 \pm 0.02 $ \\ \hline
Photoproduction &   $<0.02 $    & $<0.02$ \\ \hline
Photon-Photon & $ 0.05\pm 0.02$   & $ 0.09 ^{+0.09}_{-0.05} $ \\ \hline \hline
Total SM  & $ 1.0\pm 0.2$   & $ 0.4\pm0.1 $ \\ \hline
\end{tabular}
\\

\caption{Observed and  predicted event rates.
The  limits given correspond to 95\% confidence level.
Quoted numbers refer to the summed
production of  both lepton charged states. }
\label{tableback}
\end{center}
\end{table}

