| 1 |
%\subsection{Non $t\bar{t}$ Backgrounds}
|
| 2 |
%\label{sec:othBG}
|
| 3 |
|
| 4 |
Backgrounds in which one or both leptons do not originate from
|
| 5 |
electroweak decays (fake leptons) are assessed using the method
|
| 6 |
of Ref.~\cite{ref:top}. A fake lepton is a lepton candidate
|
| 7 |
originating from within a jet, such as a lepton from semileptonic $b$
|
| 8 |
or $c$ decays, a muon decay-in-flight, a pion misidentified as an
|
| 9 |
electron, or an unidentified photon conversion. Estimates of the
|
| 10 |
contributions to the signal region from pure multijet QCD, with two
|
| 11 |
fake leptons, and in $W+\mathrm{jets}$, with one fake lepton
|
| 12 |
in addition to the lepton from the decay of the $W$, are derived
|
| 13 |
separately. We find $0.00^{+0.04}_{-0.00}$ and $0.0^{+0.5}_{-0.0}$
|
| 14 |
($0.00^{+0.04}_{-0.00}$ and $0.5 \pm 0.5$)
|
| 15 |
for the multijet QCD and $W$+jets contributions to the high \MET\
|
| 16 |
(high \Ht) signal regions, respectively, and thus
|
| 17 |
consider these backgrounds to be negligible.
|
| 18 |
|
| 19 |
Backgrounds from DY are estimated with the data-driven $R_{out/in}$ technique~\cite{ref:top},
|
| 20 |
which leads to an estimated DY contribution which is consistent with 0.
|
| 21 |
Backgrounds from processes with two vector bosons and single top
|
| 22 |
are negligible compared to dilepton $t\bar{t}$.
|
