| 72 |
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As electrons from $W$ and $Z$ boson decays are isolated, requiring electron isolated from tracking |
| 73 |
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activity can significantly suppress em-jets that usually have a large number of soft tracks around the |
| 74 |
|
leading $\pi^0$. It also can suppress real electrons from semi-leptonic decays of $b$ quarks which |
| 75 |
< |
tend to be non-isolated as well. We consider several versions of the track isolation requirements: |
| 75 |
> |
tend to be non-isolated as well. We consider several versions of the track isolation requirements |
| 76 |
> |
using CTF tracks around the electron candidates. |
| 77 |
|
|
| 78 |
|
\begin{equation} |
| 79 |
|
\label{eq:trkIsoN} |
| 276 |
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0.1 (0.2) for barrel(endcap). |
| 277 |
|
\begin{figure}[!tb] |
| 278 |
|
\begin{center} |
| 279 |
< |
\includegraphics[width=16cm]{Figs/trkIso.eps} |
| 279 |
> |
\includegraphics[width=16cm]{Figs/TrkIso.eps} |
| 280 |
|
\vspace{-10mm} |
| 281 |
|
\caption{The $Iso^{trk}_{Norm}$ discriminant for electrons (blue soild line) and misidentified jets (red dashed line) for barrel (top left) and endcap (top right). The signal $v.s.$ background efficiencies |
| 282 |
|
obtained by varying the threshold are displayed in bottom left (barrel) and bottom right (endcap) plots. |
| 307 |
|
|
| 308 |
|
\begin{figure}[!tb] |
| 309 |
|
\begin{center} |
| 310 |
< |
\includegraphics[width=16cm]{Figs/Eff_hoE_IsoEmHad.eps} |
| 310 |
> |
\includegraphics[width=16cm]{Figs/Eff_HoE_IsoEmHad.eps} |
| 311 |
|
\vspace{-10mm} |
| 312 |
|
\caption{$H/E$ and $EmHad$ variables for barrel (left) and endcap (right). |
| 313 |
|
\label{fig:Eff_hoE_IsoEmHad}} |
| 347 |
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We summarize the thresholds for barrel and endcap in Table~\ref{tab:OurSelection} |
| 348 |
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and proceed with detailed analysis of the performance in the next Section. |
| 349 |
|
|
| 349 |
– |
|
| 350 |
|
\begin{table}[htb] |
| 351 |
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\caption{Thresholds and efficinecy of the criteria.} |
| 352 |
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\label{tab:OurSelection} |
| 363 |
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\end{center} |
| 364 |
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\end{table} |
| 365 |
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|
| 366 |
+ |
|
