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\section{Acceptance and efficiency systematics} |
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\label{sec:systematics} |
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{\bf \color{red} MANY OF THESE STUDIES NEED TO BE UPDATED WITH 38X MC} |
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This is a search for new physics contributions to |
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events with high \met and lots of jet activity. |
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As seen in Section~\ref{sec:results}, there is no |
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The systematic uncertainty on the lepton acceptance consists |
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of two parts: the trigger efficiency uncertainty and the |
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ID and isolation of uncertainty. We discuss these in turn. |
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ID and isolation uncertainty. We discuss these in turn. |
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The trigger efficiency |
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for two leptons of $P_T>10$ GeV, with one lepton of |
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$P_T>20$ GeV is very high, except in some corners |
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of phase space, see Section~\ref{sec:trgEff}. |
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of phase space, see Section~\ref{sec:trgeffsum}. |
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We estimate the efficiency uncertainty to be a few percent, |
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mostly in the low $P_T$ region. |
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the final state. For example, in MC we find that the |
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lepton isolation efficiency differs by $\approx 4\%$ |
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{\bf per lepton} between $Z$ events and $t\bar{t}$ events\cite{ref:top}. |
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\noindent {\bf This figure should be cut off at 100 GeV, and |
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the y-axis should be zero-suppressed} |
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%\noindent {\bf This figure should be cut off at 100 GeV, and |
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%the y-axis should be zero-suppressed} |
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Another significant source of systematic uncertainty is |
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associated with the jet and $\met$ energy scale. The impact |
