NLO electroweak corrections to off-shell top-antitop production with leptonic decays at the LHC

For the first time the next-to-leading-order electroweak corrections to the full off-shell production of two top quarks that decay leptonically are presented. this calculation includes all off-shell, non-resonant, and interference effects for the 6-particle phase space. while the electroweak corrections are below one per cent for the integrated cross section, they reach up to 15% in the high-transverse-momentum region of distributions. to support the results of the complete one-loop calculation, we have in addition evaluated the electroweak corrections in two different pole approximations, one requiring two on-shell top quarks and one featuring two on-shell w bosons. while the former deviates by up to 10% from the full calculation for certain distributions, the latter provides a very good description for most observables. the increased centre-of-mass energy of the lhc makes the inclusion of electroweak corrections extremely relevant as they are particularly large in the sudakov regime where new physics is expected to be probed.