| 10 |
|
reconstruction, PDF, and luminosity are described below |
| 11 |
|
|
| 12 |
|
\begin{itemize} |
| 13 |
< |
\item {\it Trigger}: the trigger path used to select four categories require |
| 14 |
< |
leptons to be isolated. Though, the isolation criteria depends on the |
| 15 |
< |
occupancy of the sub-detectors, the alignment of the tracker (when |
| 16 |
< |
considering tracker isolation variables), and noise in the calorimeters (when |
| 17 |
< |
considering a calorimetric isolation), the trigger efficiency is |
| 18 |
< |
expected to be around 99\%, and therefore, a systematic uncertainty |
| 19 |
< |
is conservatively estimated as 1\%. |
| 20 |
< |
|
| 21 |
< |
\item {\it Reconstruction}: we assign 2\% systematic uncertainty per lepton |
| 22 |
< |
due to initial tracker alignment which is of paramount importance to |
| 23 |
< |
reconstruct leptons, 2\% and 1\% is assigned for the determination |
| 24 |
< |
of the charge of the electron and muon candidates, respectively. We assigned |
| 25 |
< |
a larger electron charge identification uncertainty due to much stronger |
| 26 |
< |
Bremsstrahlung energy loss which makes the charge identification more |
| 27 |
< |
difficult. |
| 13 |
> |
\item {\it Trigger}: the trigger path used to select four categories |
| 14 |
> |
require leptons to be isolated. Though, the isolation criteria |
| 15 |
> |
depends on the occupancy of the sub-detectors, the alignment of the |
| 16 |
> |
tracker (when considering tracker isolation variables), and noise in |
| 17 |
> |
the calorimeters (when considering a calorimetric isolation), the |
| 18 |
> |
trigger efficiency is expected to be around 99\%, and therefore, a |
| 19 |
> |
systematic uncertainty is conservatively estimated as 1\%. From the |
| 20 |
> |
current analysis of $Z\rightarrow l^+l^-$ in |
| 21 |
> |
CMS~\ref{Zmumu}~\ref{Zee}, the number of \Z events is estimated of the |
| 22 |
> |
order of 50k per 100pb$^{-1}$ of data analysed. To determine the |
| 23 |
> |
trigger efficiency ``tag-and-probe'' method~\ref{TP} will be used. |
| 24 |
> |
|
| 25 |
> |
\item {\it Reconstruction}: we assign 2\% systematic uncertainty per |
| 26 |
> |
lepton due to initial tracker alignment which is of paramount |
| 27 |
> |
importance to reconstruct leptons, 2\% and 1\% is assigned for the |
| 28 |
> |
determination of the charge of the electron and muon candidates, |
| 29 |
> |
respectively. We assigned a larger electron charge identification |
| 30 |
> |
uncertainty due to much stronger Bremsstrahlung energy loss which |
| 31 |
> |
makes the charge identification more difficult. The mismeasurement of |
| 32 |
> |
the charge is of the order of 2\% in CMSSW\_1\_6\_7 release for |
| 33 |
> |
electron. The estimation of the fraction with data will be done by |
| 34 |
> |
looking at the \Z peak without opposite charge requirement. Then |
| 35 |
> |
number of events within the \Z mass windows asking for two leptons of |
| 36 |
> |
same sign will give us a estimate of the fraction of mismeasure sign |
| 37 |
> |
leptons. |
| 38 |
|
|
| 39 |
< |
\item {\it Lepton identification}: we assign 4\% of systematic uncertainty |
| 40 |
< |
due to efficiency measurement from early data using ``tag-and-probe'' |
| 41 |
< |
method and 2\% for that for a muon. Additionally we assign a systematic |
| 42 |
< |
uncertainty on lepton energy scale of 2\% per lepton. |
| 39 |
> |
\item {\it Lepton identification}: we assign 4\% of systematic |
| 40 |
> |
uncertainty due to efficiency measurement from early data using |
| 41 |
> |
``tag-and-probe'' method and 2\% for that for a muon. Additionally we |
| 42 |
> |
assign a systematic uncertainty on lepton energy scale of 2\% per |
| 43 |
> |
lepton. The letpons scale will be established using the \Z mass peak. |
| 44 |
|
|
| 45 |
|
\item {\it PDF uncertainties}: we estimate PDF uncertainties following prescription |
| 46 |
|
described in~\cite{OldNote}. The uncertainty is found to be |
| 70 |
|
|
| 71 |
|
\end{center} |
| 72 |
|
\caption{Systematic uncertainties for $pp\rightarrow \WZ$ cross section measurement |
| 73 |
< |
and significance estimation for 1 fb$^-1$ of integrated luminosity.} |
| 73 |
> |
and significance estimation for 300 \invpb of integrated luminosity.} |
| 74 |
|
\label{tab:sys} |
| 75 |
|
\end{table} |
| 76 |
|
|
| 126 |
|
\end{tabular} |
| 127 |
|
|
| 128 |
|
\end{center} |
| 129 |
< |
\caption{Systematics per channels in percent for $pp\rightarrow WZ$ cross section measurement and significance estimation for 1 fb$^-1$ of integrated luminosity. These systematics do not include the background substraction.} |
| 129 |
> |
\caption{Systematics per channels in percent for $pp\rightarrow WZ$ cross section measurement and significance estimation for 300 \invpb of integrated luminosity. These systematics do not include the background substraction.} |
| 130 |
|
\label{tab:FullSys} |
| 131 |
|
\end{table} |
| 132 |
|
|
