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claudioc |
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\section{Event yields}
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\label{sec:yields}
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The results of the search are summarized in
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Table~\ref{tab:SR} and Fig.~\ref{fig:htmet}.
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The event yields are consistent with the background predictions.
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In Table~\ref{tab:SR} we also show the 95\% confidence level
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observed upper limit ($N_{UL}$)
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on the number
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of non-SM events calculated using the CL$_s$ method~\cite{Junk:1999kv,ATL-PHYS-PUB-2011-011}
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under three different assumptions for the
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signal efficiency uncertainty.
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This uncertainty is discussed in Section~\ref{sec:eff}.
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\begin{table}
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\caption{\label{tab:SR} A summary of the results of this search.
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For each signal region (SR),
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we show its most distinguishing kinematic requirements, the prediction
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for the three background (BG) components as well as the total,
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the event yield, and the observed 95\% confidence
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level upper limit on the number of non-SM events ($N_{UL}$) calculated
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under three different
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assumptions for the event efficiency uncertainty (see text for details).
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Note that the count of the number of jets on the first line of
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the table includes both tagged and untagged jets.
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(THIS IS THE 2011 TABLE - PLACEHOLDER)}
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\tabcolsep 2.7pt
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\begin{scriptsize}
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\begin{tabular}{|l|c|c|c|c|c|c|c|c|c|}
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\hline
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& SR0 & SR1 & SR2 & SR3 & SR4 & SR5 & SR6 & SR7 & SR8 \\
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\hline
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No. of jets & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 3$ & $\geq 2$\\
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No. of b-tags & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 2$ & $\geq 3$ & $\geq 2$\\
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Lepton charges & $++/--$ & $++/--$ & $++$ & $++/--$ & $++/--$ & $++/--$ & $++/--$ & $++/--$ & $++/--$ \\
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$\MET$ & $> 0$ \GeV & $> 30$ \GeV & $> 30$ \GeV & $> 120$ \GeV & $> 50$ \GeV & $> 50$ \GeV & $> 120$ \GeV & $> 50$ \GeV & $> 0$ \GeV\\
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$\HT$ & $> 80$ \GeV & $> 80$ \GeV & $> 80$ \GeV & $> 200$ \GeV & $> 200$ \GeV & $> 320$ \GeV & $> 320$ \GeV & $> 200$ \GeV & $> 320$ \GeV \\
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\hline
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Charge-flip BG & $1.4 \pm 0.3$ & $1.1 \pm 0.2$ & $0.5 \pm 0.1$ & $0.05 \pm 0.01$ & $0.3 \pm 0.1$ & $0.12 \pm 0.03$ & $0.03 \pm 0.01$ & $0.008 \pm 0.004$ & $0.20 \pm 0.05$ \\
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Fake BG & $4.7 \pm 2.6$ & $3.4 \pm 2.0$ & $1.8 \pm 1.2$ & $0.3 \pm 0.5$ & $1.5 \pm 1.1$ & $0.8 \pm 0.8$ & $0.15 \pm 0.45$ & $0.15 \pm 0.45$ & $1.6 \pm 1.1$ \\
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Rare SM BG & $4.0 \pm 2.0$ & $3.4 \pm 1.7$ & $2.2 \pm 1.1$ & $0.6 \pm 0.3$ & $2.1 \pm 1.0$ & $1.1 \pm 0.5$ & $0.4 \pm 0.2$ & $0.12 \pm 0.06$ & $1.5 \pm 0.8$\\
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\hline
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Total BG & $10.2 \pm 3.3$ & $7.9 \pm 2.6$ & $4.5 \pm 1.7$ & $1.0 \pm 0.6$ & $3.9 \pm 1.5$ & $2.0 \pm 1.0$ & $0.6 \pm 0.5$ & $0.3 \pm 0.5$ & $3.3 \pm 1.4$ \\
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Event yield & 10 & 7 & 5 & 2 & 5 & 2 & 0 & 0 & 3 \\
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\hline
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$N_{UL}$ (12\% unc.) & 9.1 & 7.2 & 6.8 & 5.1 & 7.2 & 4.7 & 2.8 & 2.8 & 5.2 \\
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$N_{UL}$ (20\% unc.) & 9.5 & 7.6 & 7.2 & 5.3 & 7.5 & 4.8 & 2.8 & 2.8 & 5.4 \\
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$N_{UL}$ (30\% unc.) & 10.1 & 7.9 & 7.5 & 5.7 & 8.0 & 5.1 & 2.8 & 2.8 & 5.7 \\
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\hline
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\end{tabular}
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\end{scriptsize}
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\end{table}
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\begin{figure}[hbtp]
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\begin{center}
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% \includegraphics[width=\linewidth]{figures/metht.png}
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\includegraphics[width=0.7\linewidth]{MetVsHt.pdf}
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\includegraphics[width=0.49\linewidth]{Ht.pdf}
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\includegraphics[width=0.49\linewidth]{Met.pdf}
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\caption{\label{fig:htmet}
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Top plot: distribution of \MET vs. $\HT$ for the 10 events in the
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baseline region (SR0).
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% $\Pe\Pe$ events: circles; $\Pe\Pgm$ events:
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% squares; $\Pgm\Pgm$ events: triangles.
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% Note that SR0 corresponds to the baseline event
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% selection of Section~\ref{sec:selections}.
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Note that the $\geq 2$ jets requirement in SR0 implies $\HT > 80$ GeV.
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Bottom left plot: projection of the scatter plot on the $\HT$ axis.
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Bottom right plot: projection of the scatter plot on the \MET axis.
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For the one-dimensional distributions, the number of events in each bin is scaled appropriately to reflect units of events per
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10 GeV and is compared with the background (BG)
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predictions, with their uncertainties.
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(THESE ARE THE 2011 PLOTS - PLACEHOLDER)}
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\end{center}
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\end{figure}
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