Enhanced ultraviolet cancellations in supergravity theories
Tue, Nov. 04th 2014, 11:00
Salle Claude Itzykson, Bât. 774, Orme des Merisiers
Supergravity theories are better behaved in the ultraviolet than had been believed possible. It may even be true that certain theories supergravity theories, such as N=8 supergravity, are ultraviolet finite to all loop orders. We describe a new set of ultraviolet cancellations beyond those identified via standard symmetry arguments. We give examples in N=4 supergravity at three loops and N=5 supergravity at four loops.