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\section{Preselection yields}
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\label{sec:yields}
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The data yields and the MC predictions are given in Table~\ref{tab:yields}.
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The MC yields are normalized to xx pb$^{-1}$ using the cross-sections
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from Reference~\cite{ref:xsec} assuming 100\% trigger efficiency {\color{red}
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(will have to fix this eventually)}. As anticipated, the MC predicts
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that the preselection is dominated by $t\bar{t}$. The data yield is
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in good agreement with the prediction.
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\begin{table}[htb]
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\begin{center}
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\caption{\label{tab:yields} Data and Monte Carlo yields for the preselection.
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(ttdil refers to dileptonic $t\bar{t}$ including $t \to W \to \ell$,
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ttothr are all other $t\bar{t}$ modes).}
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\begin{tabular}{|c|c|c|c|c|}
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\hline
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Sample & ee & $\mu\mu$ & $e\mu$ & total \\ \hline
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ttdil & & & & \\
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ttothr & & & & \\
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Zjets & & & & \\
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$WW$ & & & & \\
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$WZ$ & & & & \\
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$ZZ$ & & & & \\
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$tW$ & & & & \\ \hline
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total SM MC & & & & \\ \hline
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data & & & & \\ \hline
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\end{tabular}
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\end{center}
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\end{table}
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