We present a next-to-leading-order QCD calculation for e+\nu e\mu+\nu\mu jj
production in vector-boson fusion, i.e. the scattering of two positively
charged W bosons at the LHC. We include the complete set of electroweak
leading-order diagrams for the six-particle final state and quantitatively
assess the size of the s-channel and interference contributions in VBF
kinematics. The calculation uses the complex-mass scheme to describe the
W-boson resonances and is implemented into a flexible Monte Carlo generator.
Using a dynamical scale based on the transverse momenta of the jets, the QCD
corrections stay below about 10% for all considered observables, while the
residual scale dependence is at the level of 1%.Comment: 60 page
