Measurement of the cross section for top-quark pair production in pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector using final states with two high-pt leptons
- Aad, Georges et al
- arXiv:1202.4892CERN-PH-EP-2011-223
| (a) Jet multiplicity distribution for $ee$+$\mu\mu$+$e\mu$+$e$TL+$\mu$TL events without a $b$-tagging requirement. (b) Multiplicity distribution of $b$-tagged jets in the $ee$+$\mu\mu$+$e\mu$ channels. Contributions from diboson and single top-quark events are summarized as `Other EW'. The events in (b) are not a simple subset of those in (a) because the event selections for the $b$-tag and non-$b$-tag analyses differ. Uncertainties shown are statistical and systematic combined. The distributions are shown as stacked histograms. |
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| The $\met$ distribution in the signal region for (a) the five non-$b$-tag channels combined and, (b) the three $b$-tagged channels combined. Contributions from diboson and single top-quark events are summarized as `Other EW'. Uncertainties shown are statistical and systematic combined. The last bin in each figure is an overflow bin, including all events above 190 GeV. The distributions are shown as stacked histograms. |
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| Summary of the individual cross section measurements and the combination of non-$b$-tag and exclusive $b$-tagged results. The vertical dashed line and yellow band are the approximate NNLO theory calculation and its uncertainty. |