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\subsection{Test in $\gamma +$ jet}
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\noindent{\bf This Section is a placeholder for a study that has
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no been done yet. We may just comment it out before releasing
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the note on Monday}
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Next, we want to test the FR measured in jet triggered data on
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a $\gamma +$ jet sample. This is an interesting test because
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the jets in $\gamma +$ jets have a different heavy flavor and
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quark-to-gluon ration than the jets in typical QCD events.
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To perform this test we select a $\gamma + jets$ sample in the
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following way:
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\begin{itemize}
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\item We use the EG Secondary/Primary dataset.
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\item We require that the Photon\_10\_L1R trigger fired.
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\item We selet offline photons as......
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\item We match the offline-selected photon with the HLT object
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that fired the Photon10\_10\_L1R trigger.
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\item If there are two such offline photons passing the cuts,
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we reject the event (for simplicity? Not sure...).
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\item We also need to reject $z \to ee$ somehow
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\item We select FO that fail the cuts of Sections~\ref{sec:eleID}
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and~\ref{sec:muID}. We weight each of these events by FR/(1-FR).
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\item We then select leptons that pass the cuts of Sections~\ref{sec:eleID}
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and~\ref{sec:muID}. We compare the yield of these events with the
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FR background prediction which is the sum of the weighted events above.
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\end{itemize}
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The reslts are shown in Table~\ref{tab:gammajet}.
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\begin{table}[htb]
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\begin{center}
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\caption{\label{tab:gammajet} Observed and predicted yields of leptons
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in the $\gamma +$ jet sample.}
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\begin{tabular}{|l|c|c|c|c|c||} \hline
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& Observed & V1 predicted & V2 predicted & V3 predicted & Muon Predicted \\
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\hline
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electrons & & & & & n.a. \\
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muons & & n.a. & n.a. & n.a. & \\
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\hline
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\end{tabular}
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\end{center}
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\end{table}
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{\em Here we comment on what we see.} |
