All Tree Level Scattering Amplitudes in Chern-Simons Theories with Fundamental Matter.

  title={All Tree Level Scattering Amplitudes in Chern-Simons Theories with Fundamental Matter.},
  author={Karthik Inbasekar and Sachin Jain and Pranjal Nayak and V. Umesh},
  journal={Physical review letters},
  volume={121 16},
We show that Britto-Cachazo-Feng-Witten (BCFW) recursion relations can be used to compute all tree level scattering amplitudes in terms of 2→2 scattering amplitude in U(N) N=2 Chern-Simons (CS) theory coupled to matter in the fundamental representation. As a by-product, we also obtain a recursion relation for the CS theory coupled to regular fermions, even though in this case standard BCFW deformations do not have a good asymptotic behavior. Moreover, at large N, 2→2 scattering can be computed… 

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