Clara Nellist (Göttingen): Top quarks and friends: Recent tt+X results from ATLAS

The top quark is the most massive known fundamental particle, and as such is potentially very sensitive to effects of physics beyond the Standard Model. Measuring the coupling to the Higgs boson, discovered by the ATLAS and CMS collaborations in 2012, is one method to probe for deviations from Standard Model predictions, which would hint at new physics. It is also crucial to perform precision measurements of the top quark properties, which is now possible with the unprecedented dataset provided by the second operational run of the LHC. Various recent ATLAS results of pairs of top quarks in association with H, Z or W bosons, and with additional pairs of top quarks will be presented.