Electroweak and QCD corrections to top-pair hadroproduction in association with heavy bosons

A bstract We compute the contribution of order α S 2 α 2 to the cross section of a top-antitop pair in association with at least one heavy Standard Model boson — Z , W ± , and Higgs — by including all effects of QCD, QED, and weak origin and by working in the automated M ad G raph 5_ a MC@NLO framework. This next-to-leading order contribution is then combined with that of order α S 3 α , and with the two dominant lowest-order ones, α S 2 α and α S α 2 , to obtain phenomenological results relevant to a 8, 13, and 100 TeV pp collider.