| 17 |
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\item We start out with a pre-selection which is as close as |
| 18 |
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possible to the published (or soon to be published) $t\bar{t}$ |
| 19 |
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dilepton analysis\cite{ref:top} (same lepton ID, same jet definitions, |
| 20 |
< |
etc.). We do make a couple of small modifications: |
| 20 |
> |
etc.). We do make a couple of substantive modifications: |
| 21 |
|
|
| 22 |
|
\begin{enumerate} |
| 23 |
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\item The top analysis requires two leptons of $P_T > 20$ GeV. |
| 30 |
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GeV with \met $>30$ GeV ($ee$ and $e\mu$) or \met $>20$ GeV ($e \mu$). |
| 31 |
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We tighten the \met cut to 50 GeV and we |
| 32 |
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also require that the scalar sum of the $P_T$ of all jets with $P_T > 30$ |
| 33 |
< |
GeV to be $> 100$ GeV. These requirements considerably |
| 33 |
> |
GeV be $> 100$ GeV. These requirements considerably |
| 34 |
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reduce backgrounds to the $t\bar{t}$ sample, {\em e.g.}, backgrounds |
| 35 |
< |
from Drell Yan. |
| 35 |
> |
from Drell Yan and $W+$jets. |
| 36 |
|
\end{enumerate} |
| 37 |
|
|
| 38 |
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\item The pre-selection consists mostly of $t\bar{t}$ events. We perform |
