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We briefly report on results of the first calculations of next-to-leading-order electroweak corrections to Wand Z-boson pair production at the LHC that fully take into account leptonic W/Zboson decays and off-shell effects. For W-pair production we generally confirm the validity of a double-pole approximation based on doubly-resonant contributions, but also reveal its failure to describe transverse-lepton-momentum distributions in the high-energy tails. For Z-pair production we zoom into the ZZ∗ off-shell region, where direct Z-pair production delivers irreducible background to the Higgs-boson signal, and find that electroweak corrections cannot be trivially extrapolated from the on-shell ZZ region.

Electroweak corrections to gauge-boson pair production processes at the LHC including leptonic W/Z decays