| 10 |
|
process at NLO the NLO event generator MC@NLO 3.1~\cite{Frixione:2002ik} together with PDF set |
| 11 |
|
CTEQ6M was used. |
| 12 |
|
|
| 13 |
+ |
\subsection{Signal Definition} |
| 14 |
+ |
|
| 15 |
+ |
This analysis is studying the final state of on-shell $W$ and $Z$ |
| 16 |
+ |
boson, both of them decaying leptonically. The fully final leptonic |
| 17 |
+ |
final state $l^+ l^- l^\pm \nu$ also receives a contribution from the |
| 18 |
+ |
$W\gamma *$ process, where the $\gamma *$ stands for a virtual photon |
| 19 |
+ |
through the $WW\gamma$ vertex. In this analysis, only events with $l^+ |
| 20 |
+ |
l^-$ invariant mass consistent with $Z$ mass will be considered. |
| 21 |
+ |
|
| 22 |
+ |
%# for bbll: |
| 23 |
+ |
%#CS NLO ((Z/gamma*->l+l-)bb) = 830pb = 345 pb * 2.4, where: |
| 24 |
+ |
%#- 345 pb is LO CS calculated with precision of ~0.15% |
| 25 |
+ |
%#- 2.4 is MCMF calculated k-factor with precision ~30% (!) |
| 26 |
+ |
%# 830x0.173 (== XS x eff.) = 143.59pb |
| 27 |
+ |
|
| 28 |
+ |
|
| 29 |
+ |
\begin{table}[tbh] |
| 30 |
+ |
\begin{tabular}{llllll} \hline |
| 31 |
+ |
Sample & Generator & Sample name & Events & $\sigma \cdot \epsilon \cdot k$ & k-factor \\ \hline |
| 32 |
+ |
WZ & Pythia & /WZ/CMSSW\_1\_6\_7-CSA07-1195663763/RECO & 58897 & 0.585 pb & 1.92 \\ |
| 33 |
+ |
$Zb\bar{b}$ & COMPHEP & /comphep-bbll/CMSSW\_1\_6\_7-CSA07-1198677426/RECO & 143.59 pb & 2.4 \\ |
| 34 |
+ |
``Chowder'' & ALPGEN & /CSA07AllEvents/CMSSW\_1\_6\_7-CSA07-Chowder-A1-PDAllEvents-ReReco-100pb/RECO & 25 M & event weights & - \\ |
| 35 |
+ |
\hline |
| 36 |
+ |
\end{tabular} |
| 37 |
+ |
|
| 38 |
+ |
\caption{Monte Carlo samples used in this analysis} |
| 39 |
+ |
\end{table} |
| 40 |
|
|
| 41 |
|
\subsection{Signal and Background Monte Carlo samples} |
| 42 |
|
|
