| 44 |
|
on studies of fake |
| 45 |
|
leptons in jet events. The second background, estimated from MC, consists of rare SM processes and is dominated |
| 46 |
|
by $t\bar{t}$W and $t\bar{t}$Z. The systematic uncertainty on both the fake lepton and rare backgrounds is 50\%. |
| 47 |
< |
A third, small background contribution is from ``charge flips'' and consists of events with opposite-sign leptons |
| 47 |
> |
A third, small background contribution is from ``charge flips'' and consists of events with opposite-sign (OS) leptons |
| 48 |
|
where one of the leptons is an electron whose charge is misreconstructed. |
| 49 |
< |
This background is estimated using the electron charge misreconstruction probability, which is extracted from studies of Z$\to e^+e^-$ events in data. |
| 49 |
> |
This background is estimated from an OS dilepton data sample, weighted by the electron charge misreconstruction probability, |
| 50 |
> |
which is extracted from studies of Z$\to$ee events in data and MC. |
| 51 |
|
%This background is based on MC predictions, which are validated using a sample of Z$\to e^+e^-$ events. |
| 52 |
|
|
| 53 |
|
Signal regions are defined by placing additional requirements on the jet multiplicity, b-tagged jet multiplicity, |
