Measured x-section:
Muon Channel: $\sigma_{t\bar{t}} = 242.6  \pm   9.8  \mathrm{(sys.)}  \pm  4.2 \mathrm{(stat.)} \pm  6.5 \mathrm{(lumi.)} \mathrm{pb}$
Measured eps_b: Muon $silon_b = 0.350 $
Elec Channel: $\sigma_{t\bar{t}} = 266.4  \pm  11.4  \mathrm{(sys.)}  \pm  5.1 \mathrm{(stat.)} \pm  7.1 \mathrm{(lumi.)} \mathrm{pb}$
Measured eps_b: Elec $silon_b = 0.328 $
ElMu Channel: $\sigma_{t\bar{t}} = 245.5  \pm   9.6  \mathrm{(sys.)}  \pm  2.5 \mathrm{(stat.)} \pm  6.6 \mathrm{(lumi.)} \mathrm{pb}$
Measured eps_b: ElMu $silon_b = 0.349 $