Fig. 2.

Distributions of a the number of jets, b the transverse momentum $p_{\mathrm{T}}$ of the $b$-tagged jets, c the $|\mathit{\eta }|$ of the electron, d the $p_{\mathrm{T}}$ of the electron, e the $|\mathit{\eta }|$ of the muon and f the $p_{\mathrm{T}}$ of the muon, in events with an opposite-sign $e\mathit{\mu }$ pair and at least one $b$-tagged jet. The $\sqrt{s}=7\mathrm{TeV}$ data are compared to the expectation from simulation, broken down into contributions from $t\overline{t}$, single top, $Z$+jets, dibosons, and events with misidentified electrons or muons, normalised to the same number of entries as the data. The lower parts of the figure show the ratios of simulation to data, using various $t\overline{t}$ signal samples and with the cyan band indicating the statistical uncertainty. The last bin includes the overflow