| 4 |
|
|
| 5 |
|
|
| 6 |
|
The \mt\ tail for single-lepton top events (\ttsl\ and single top) is dominated by jet resolution effects. The \W\ cannot be far off-shell because $\mW < \mtop$. |
| 7 |
< |
The modeling of the \mt\ tail from jet resolution effects is studied |
| 8 |
< |
using \zjets\ data and MC samples. |
| 7 |
> |
The modeling of the \mt\ tail from jet resolution effects can be studied |
| 8 |
> |
using \zjets\ data and MC samples. However, as we will show below, |
| 9 |
> |
this test is statistically limited and can only be performed for the |
| 10 |
> |
\met\ requirements corresponding to SRA and SRB. |
| 11 |
|
|
| 12 |
|
\Z\ events are selected by requiring exactly 2 good leptons (satisfying ID |
| 13 |
|
and isolation requirements) and requiring the \mll\ to be in the range |
| 16 |
|
To reduce \ttbar\ backgrounds, events with a CSVM tag %H |
| 17 |
|
are removed. |
| 18 |
|
The positive lepton is treated as a neutrino and so is added to the MET: \met\ $\rightarrow$ \pt(\Lepp) + \met, |
| 19 |
< |
and the \mt\ is recalculated with the positive lepton \mt(\Lepm, \met). |
| 19 |
> |
and the \mt\ is recalculated with the negative lepton: \mt(\Lepm, \met). |
| 20 |
|
The resulting ``pseudo-\mt'' is dominated by jet resolution effects, since no off-shell |
| 21 |
|
\Z\ production enters the sample due to the \mll\ requirement. |
| 22 |
|
This section describes how well the MC predicts the tail of ``pseudo-\mt''. |
| 26 |
|
We then perform the exact same type of Data/MC comparison and analysis as |
| 27 |
|
described for CR1 in Section~\ref{sec:cr1}. For CR1 we collected |
| 28 |
|
the data/MC tail information in |
| 29 |
< |
Table~\ref{tab:cr1yields} ; the equivalent for CR2 is |
| 30 |
< |
Table~\ref{tab:cr2yields}. For CR2 the statistics are not sufficient. |
| 31 |
< |
(for CR2 the statistics are not sufficient to split electrons and muons). |
| 30 |
< |
The last line of Table~\ref{tab:cr2yields} gives the data/MC scale factor |
| 29 |
> |
Table~\ref{tab:cr1yields}; the equivalent for CR2 is |
| 30 |
> |
Table~\ref{tab:cr2yields} (for CR2 the statistics are not sufficient to split electrons and muons). |
| 31 |
> |
The last line of Table~\ref{tab:cr2yields} gives the data/MC scale factors |
| 32 |
|
for the \ttbar\ lepton $+$ jets $M_T$ tail ($SFR_{top}$). This is |
| 33 |
|
calculated in the same way as $SFR_{wjets}$ of Table~\ref{tab:cr1yields}. |
| 34 |
|
Just as in CR1, there is an excess of data in the tails, as reflected |
| 94 |
|
electron channels. The pseudo-\mt\ distributions are shown |
| 95 |
|
before any additional requirements (top, right) and after |
| 96 |
|
requiring pseudo-\met $>$50 GeV (bottom, left) and pseudo-\met |
| 97 |
< |
$>$ 100 GeV (bottom, right) . |
| 97 |
> |
$>$ 100 GeV (bottom, right). |
| 98 |
|
\label{fig:cr2met} |
| 99 |
|
} |
| 100 |
|
\end{center} |
