| 5 |
|
$t\bar{t}$ analysis. We select events with two opposite sign isolated |
| 6 |
|
leptons ($ee$, $e\mu$, or $\mu\mu$); one of the leptons must |
| 7 |
|
have $P_T > 20$ GeV, |
| 8 |
< |
the other one must have $P_T > 10$ GeV\footnote{In case of events with |
| 8 |
> |
the other one must have $P_T > 10$ GeV. Events consistent with $Z$ are rejected. |
| 9 |
> |
In case of events with |
| 10 |
|
more than two such leptons, we select the pair that maximizes the scalar |
| 11 |
< |
sum of lepton $P_T$'s.}; |
| 12 |
< |
there must be two JPT |
| 11 |
> |
sum of lepton $P_T$'s. |
| 12 |
> |
There must be two JPT |
| 13 |
|
jets of $P_T > 30$ GeV and $|\eta| < 2.5$; the scalar sum of the |
| 14 |
|
$P_T$ of all such jets must exceed 100 GeV; jets must pass |
| 15 |
< |
{\tt caloJetId} and be separated by $\Delta R >$ 0.4 from the |
| 16 |
< |
two leptons. Finally $\met > 50$ GeV |
| 17 |
< |
(we use tcMet). More details are given in the subsections below. |
| 15 |
> |
{\tt caloJetId} and be separated by $\Delta R >$ 0.4 from any |
| 16 |
> |
lepton passing the selection. |
| 17 |
> |
Finally $\met > 50$ GeV (we use tcMet). More details are given in the subsections below. |
| 18 |
|
|
| 19 |
|
\subsection{Event Cleanup} |
| 20 |
|
\label{sec:cleanup} |
| 56 |
|
\item At least one of the hits from the |
| 57 |
|
standalone muon must be used in the global fit. |
| 58 |
|
|
| 59 |
< |
\item {\color{red} Should we add a cut on the momentum error?} |
| 59 |
> |
\item Require tracker $\Delta P_T/P_T < 0.1$. This cut was not in the original top analysis. |
| 60 |
> |
It is motivated by the observation of |
| 61 |
> |
poorly measured muons in data with large |
| 62 |
> |
relative $P_T$ uncertainty, giving significant contributions to the \met. |
| 63 |
> |
%{\color{red} This is not applied to the 11 pb iteration.} |
| 64 |
> |
|
| 65 |
|
|
| 66 |
|
\end{itemize} |
| 67 |
|
|
| 116 |
|
|
| 117 |
|
We remove $e^+e^-$ and $\mu^+ \mu^-$ events with invariant |
| 118 |
|
mass between 76 and 106 GeV. We also remove events |
| 119 |
< |
with invariant mass $<$ 10 GeV. |
| 119 |
> |
with invariant mass $<$ 10 GeV, since this kinematical region is |
| 120 |
> |
not well reprodced in CMS Monte Carlos. |
| 121 |
> |
|
| 122 |
> |
In addition, we remove $Z \to \mu\mu\gamma$ |
| 123 |
> |
candidates with the $\gamma$ collinear with one of the muons. This is |
| 124 |
> |
done as follows: |
| 125 |
> |
if the ecal energy associated with one of the muons is greater than 6 GeV, |
| 126 |
> |
we add this energy to the momentum of the initial muon, and we recompute |
| 127 |
> |
the $\mu\mu$ mass. If this mass is between 76 and 106 GeV, the event is rejected. |
| 128 |
> |
|
| 129 |
|
|
| 130 |
|
\subsection{Trigger Selection} |
| 131 |
|
\label{sec:trigSel} |
| 153 |
|
% We currently |
| 154 |
|
% do not require MC events to pass any triggers. |
| 155 |
|
|
| 156 |
+ |
|
| 157 |
+ |
|
| 158 |
+ |
|
| 159 |
+ |
|
| 160 |
+ |
|
| 161 |
+ |
|
| 162 |
+ |
|
| 163 |
+ |
|
| 164 |
|
\begin{itemize} |
| 165 |
|
\item single-muon triggers |
| 166 |
|
\begin{itemize} |
