Scattering Amplitudes of Massive N=2 Gauge Theories in Three Dimensions

Understand

We study the scattering amplitudes of mass-deformed Chern-Simons theories and Yang-Mills-Chern-Simons theories with N=2 supersymmetry in three dimensions.

• In particular, we derive the on-shell supersymmetry algebras which underlie the scattering matrices of these theories.
• We then compute various 3 and 4-point on-shell tree-level amplitudes in these theories.
• For the mass-deformed Chern-Simons theory, odd-point amplitudes vanish and we find that all of the 4-point amplitudes can be encoded elegantly in superamplitudes.