Non-planarity through unitarity in ABJM

Understand

We use unitarity techniques to compute the two-loop non-planar corrections to the Sudakov form factor and the four-point amplitude in ABJM theory.

• We start by reconstructing non-planar integrals from two-particle cuts in three dimensions.
• This causes ambiguities, due to the one-loop four-point amplitude being subleading in dimensional regularization.
• We provide a prescription to circumvent them and show that it leads to the correct results, as checked against the recent Feynman diagram computation.