Abstract
We describe the construction of the complete four-loop four-particle amplitude of N=8 supergravity. The amplitude is ultraviolet finite, not only in four dimensions, but in five dimensions as well. The observed extra cancellations provide additional nontrivial evidence that N=8 supergravity in four dimensions may be ultraviolet finite to all orders of perturbation theory.
Original language | English (US) |
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Article number | 081301 |
Journal | Physical review letters |
Volume | 103 |
Issue number | 8 |
DOIs | |
State | Published - Aug 17 2009 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy