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\section{Event Preselection} |
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\label{sec:eventSel} |
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{\color{red} This needs to be fixed up -- probably many mistakes present.}\\ |
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%{\color{red} This needs to be fixed up -- probably many mistakes present.}\\ |
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As mentioned in the introduction, the preselection is based on the |
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$t\bar{t}$ analysis. We select events with two opposite sign isolated |
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leptons ($ee$, $e\mu$, or $\mu\mu$); one of the leptons must |
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have $P_T > 20$ GeV, |
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the other one must have $P_T > 10$ GeV\footnote{In case of events with |
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the other one must have $P_T > 10$ GeV. In case of events with |
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more than two such leptons, we select the pair that maximizes the scalar |
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sum of lepton $P_T$'s.}; |
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there must be two JPT |
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sum of lepton $P_T$'s. |
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There must be two JPT |
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jets of $P_T > 30$ GeV and $|\eta| < 2.5$; the scalar sum of the |
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$P_T$ of all such jets must exceed 100 GeV; jets must pass |
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{\tt caloJetId} and be separated by $\Delta R >$ 0.4 from the |
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two leptons. Finally $\met > 50$ GeV |
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(we use tcMet). More details are given in the subsection below. |
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two selected leptons. |
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%%%TO BE REPLACED |
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%{\color{red}The 11 pb iteration only does this for the two selected |
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%leptons.} |
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% |
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Finally $\met > 50$ GeV (we use tcMet). More details are given in the subsections below. |
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\subsection{Event Cleanup} |
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\label{sec:cleanup} |
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\item At least one of the hits from the |
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standalone muon must be used in the global fit. |
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%\item Require tracker $\Delta P_T/P_T < 0.1$. This cut was not in the original top analysis. |
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%It is motivated by the observation of |
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%poorly measured muons in data with large |
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%relative $P_T$ uncertainty, giving significant contributions to the \met. |
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%{\color{red} This is not applied to the 11 pb iteration.} |
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\end{itemize} |
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