Top Quark Pair Production Cross-Section at ATLAS.

Kate Shaw
Measurements of the top quark pair ($t\bar{t}$) production cross-section in proton-proton collisions at $\sqrt{s}$~=~\unit{7}{\TeV} are presented using data recorded with the ATLAS detector at the Large Hadron Collider (LHC). The statistical combination of $t\bar{t}$ production cross-section ($\sigma_{t\bar{t}}$) measurements is presented using the lepton+jets, dilepton and all-hadronic channel. A new measurement of $\sigma_{t\bar{t}}$ with a hadronically decaying tau lepton and jets is also shown, together with an updated measurement in the all-hadronic channel. Finally a measurement...