An automated subtraction of NLO EW infrared divergences

Understand

In this paper a complete generalisation of the Catani-Seymour dipole subtraction method to next-to-leading order electroweak calculations is presented.

• All singularities due to photon and gluon radiation off both massless and massive partons in the presence of both massless and massive spectators are accounted for.
• Particular attention is paid to the simultaneous subtraction of singularities of both QCD and electroweak origin which are present in the next-to-leading order corrections to processes with more than one perturbative order contributing at Born level.
• Similarly, embedding non-dipole-like photon splittings in the dipole subtraction scheme discussed.