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\subsection{Dilepton studies in CR4} |
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\label{sec:cr4} |
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[DO WE NEED TO BETTER SPECIFY THE SELECTION FOR THIS REGION???] |
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\subsubsection{Modeling of Additional Hard Jets in Top Dilepton Events} |
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\label{sec:jetmultiplicity} |
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\item exactly 2 selected electrons or muons with \pt $>$ 20 GeV |
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\item \met\ $>$ 100 GeV |
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\item $\geq1$ b-tagged jet |
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\item Z-veto |
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\item Z-veto ($|m_{\ell\ell} - 91| > 15$ GeV) |
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\end{itemize} |
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Figure~\ref{fig:dileptonnjets} shows a comparison of the jet |
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multiplicity distribution in data and MC for this two-lepton control |
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In this case only 1 additional jet from radiation may suffice for |
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a \ttll\ event to enter the signal sample. As a result, both the |
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samples with $\ttbar+1$ jet and $\ttbar+\ge2$ jets are relevant for |
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estimating the top dilepton bkg in the signal region. |
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estimating the top dilepton background in the signal region. |
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%In this section we discuss a correction to $ N_{2 lep}^{MC} $ in Equation XXX |
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%due to differences in the modelling of the jet multiplicity in data versus MC. |
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\subsubsection{Validation of the ``Physics'' Modelling of the \ttdl\ |
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MC in CR4} |
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\subsubsection{sec:CR4-valid} |
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\label{sec:CR4-valid} |
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[THE TEXT IN THIS SUBSECTION IS ESSENTIALLY COMPLETE] |
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in Table~\ref{tab:cr4mtsf} and are close to unity. |
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The underlying \met\ and $M_T$ distributions are shown in |
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Figures~\ref{fig:cr4met} and~\ref{fig:cr4rest}. The data-MC agreement |
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Figures~\ref{fig:cr4met} and~\ref{fig:cr4mtrest}. The data-MC agreement |
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is quite good. Quantitatively, this is also shown in Table~\ref{tab:cr4yields}. |
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