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\section{Trigger efficiency} |
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\label{sec:trgEff} |
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{\color{red} Here we describe the trigger efficiency calculation. |
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Nothing here yet, since everything is still in flux.} |
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As described in Section~\ref{sec:trigSel} we rely on a |
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mixture of single and double lepton triggers. The trigger |
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efficiency is very high because for most of the phase space |
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we have two leptons each of which can fire a single lepton |
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trigger -- and the single lepton triggers are very efficient. |
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We apply to MC events a simplified model of the trigger efficiency |
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as a function of dilepton species ($ee$, $e\mu$, $\mu\mu$), the $P_T$ |
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of the individual leptons, and, in the case of muons, the $|\eta|$ |
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of the muons. We believe that this model is adequate for |
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the trigger efficiency precision needed for this analysis. |
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Details are given in Appendix~\ref{sec:appendix_trigger}. |
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We take the trigger efficiency for $ee$ as 100\%. The trigger efficiency |
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for the $e\mu$ and $\mu\mu$ final states is summarized in |
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Figures~\ref{fig:emuModel} and~\ref{fig:mumuModel}. |
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We estimate the systematic uncertainties on the trigger modeling |
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to be at the few percent level. |
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{\color{red} \bf The trigger efficiency model will be applied when |
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we move to 38x Monte Carlo. For now, we take the efficiency as 100\%.} |
