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\subsection{Test of control region with isolated track in CR5} |
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\label{sec:CR5} |
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[NEED TO VERIFY THAT THE DESCRIPTION OF SCALE FACTORS IS CORRECT AND |
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ADD A LITTLE BIT OF DETAIL, AS NOTED IN THE TEXT] |
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This CR consists of events that pass all cuts but fail the isolated |
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track veto cut. These events (especially in the tail of $M_T$) are |
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predominantly $t\bar{t}$ dileptons. Thus the test in this control |
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We define a ``pre-veto'' sample as the sample of events that pass |
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all cuts without any isolated track requirements. This sample is |
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dominated by $t\bar{t} \to \ell +$ jets. We normalize the dilepton |
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component of the top MC to that sample (NEED TO EXPLAIN EXACTLY HOW). |
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component of the top MC to that sample. This is done by normalizing |
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the total \ttbar\ MC to the $M_T$ peak region, $50 < M_T < 80$ GeV |
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in this sample. |
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Next we define a ``post-veto'' sample as the events that have an |
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isolated track. The $t\bar{t} \to \ell +$ jets component is |
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normalized in this sample (ALSO, NEED TO EXPLAIN HOW, EXACTLY). |
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normalized in this sample, again by normalizing to the $M_T$ peak |
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region. |
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These normalization factors are summarized in Table~\ref{tab:cr5mtsf}. |
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The post-veto $\ttdl$ is taken from MC, but with scale factor obtained |
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by the normalization of the ``pre-veto'' sample. |
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The underlying \met\ and $M_T$ distributions are shown in |
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Figures~\ref{fig:cr5met} and~\ref{fig:cr5mtrest}. The data-MC agreement |
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is quite good. Quantitatively, this is also shown in Table~\ref{tab:cr5yields}. |
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This is the second key test of the \ttdl\ modeling |
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\begin{table}[!h] |
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\begin{center} |
