Progress on Ultraviolet Finiteness of Supergravity

  title={Progress on Ultraviolet Finiteness of Supergravity},
  author={Z. Bern and J. J. Carrasco and H. Johansson},
  journal={arXiv: High Energy Physics - Theory},
  • Z. Bern, J. J. Carrasco, H. Johansson
  • Published 2009
  • Physics
  • arXiv: High Energy Physics - Theory
  • In this lecture we summarize recent calculations pointing to the possible ultraviolet finiteness of N = 8 supergravity in four dimensions. We outline the modern unitarity method, which enables multiloop calculations in this theory and allows us to exploit a remarkable relation between tree-level gravity and gauge-theory amplitudes. We also describe a link between observed cancellations at loop level and improved behavior of tree-level amplitudes under large complex deformations of momenta. 
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