NLO QCD corrections to W + W − b b ¯ W⁺W⁻ bb̄ production with leptonic decays in the light of top quark mass and asymmetry measurements

We present the NLO QCD corrections to the processes pp and pp̄→ W⁺W⁻ bb̄ including leptonic decays of the W bosons. Non-resonant contributions as well as diagrams with doubly resonant and singly resonant top quark propagators are fully taken into account. We employ the narrow width approximation to perform the decays of the W bosons; spin correlations are however preserved. We also calculate observables relevant for top quark mass measurements, and study the impact of kinematical requirements and different scale choices on tt̄ asymmetries.