ABJM Amplitudes in U-gauge and a Soft Theorem

Understand

We report progress in computing and analyzing all tree amplitudes in ABJM theory.

• Inspired by the isomorphism between the orthogonal Grassmannian and the pure spinor geometries, we adopt a new gauge, called u-gauge, for evaluating the orthogonal Grassmannian integral for ABJM amplitudes.
• We carry out the integral explicitly for the 8-point amplitude and obtain the complete supersymmetric amplitude.
• The physical and spurious poles arise from the integral as expected from on-shell diagrams.