Ian Allan Connelly (Royal Holloway, University of London)
The Monte Carlo setups used by ATLAS to model the $t\overline t$ and single-top production in 13 TeV pp collisions are described. The performance of different event generators is assessed by comparing measurements at 7 TeV, 8 TeV and 13 TeV to predictions from simulated data. The evaluation of systematic uncertainties and the dependence of generator predictions on the tuning parameters are also discussed.
ATLAS Collaboration (CERN)