Like-sign W-boson scattering at the LHC — approximations and full next-to-leading-order predictions

We present a new calculation of next-to-leading-order corrections of the strong and electroweak interactions to like-sign W-boson scattering at the Large Hadron Collider, implemented in the Monte Carlo integrator B onsay . The calculation includes leptonic decays of the W bosons. It comprises the whole tower of next-to-leading-order contributions to the cross section, which scale like α_s^3 α 4 , α_s^2 α 5 , α s α 6 , and α 7 in the strong and electroweak couplings α s and α . We present a detailed survey of numerical results confirming the occurrence of large pure electroweak corrections of the order of −12