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\begin{document}

\begin{table}[htb]
\begin{tabular}{|l|l|cc|cc|c|} \hline
        &       & \multicolumn{2}{|c|}{Untagged Solution 1} &  \multicolumn{2}{|c|}{Untagged Solution 2} & Tagged Solution\\
        & PT(X) & Mass & $E-P_z$  & Mass & $E-P_z$   & Mass\\
         
        & (GeV)       & (GeV)& (GeV)    & (GeV) & (GeV)    &(GeV) \\ \hline
$e^+$  top cand. &   41& $ 159\pm  7$ & 61& $ 136\pm  6$ & 21 & -- \\ 
$e^+$  top cand.  &   43&    --            & --  & $ 166\pm  8$ & 54 & $ 165\pm  6$ \\
$e^+$   top cand. &   39& $ 178\pm  5$ & 39& $ 156\pm  7$ & 21 & -- \\
$e^+$  &   27& $ 234 \pm 15 $ & 65 & $ 199 \pm 14 $ & 38 & -- \\
 \hline
$\mu^+$ &   42&    --            & --  & $ 146\pm  7$ & 19 & --\\
$\mu^-$ &   27& $ 152\pm 12$ & 53& $ 129\pm  6$& 34& $ 156\pm 10$\\
$\mu^-$$ (1\sigma)$ &   59& $ 180 $ & 67& $ 188 $ & 37 & --\\
$\mu  $ $(2\sigma)$ &   30& $ 157$ & 53& $ 139$ & 22 & --\\
$\mu^+$ top cand. &   67&    --            & --  & $ 181\pm  10$& 19 & --\\
$\mu^+$ top cand. &   50&   --             & --  & $ 174\pm 12$ & 39 & -- \\
\hline
\end{tabular}
\caption{$M_{\ell\nu X}$ calculation for the ten events in the $W$ pre-selection. Untagged solutions (mass and total $E-P_z$)  using a $W$ constraint are presented for all events.
In two events the scattered electron is detected and the tagged mass solution using an $E-P_z$ constraint can be obtained. The events selected as top candidates are indicated.}
\label{tab_topmasses}
\end{table}

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