Ultraviolet properties of N=8 supergravity at five loops
نویسندگان
چکیده
منابع مشابه
Ultraviolet behavior of N = 8 supergravity at four loops.
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.
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Z. Bern, J. J.M. Carrasco, L. J. Dixon, H. Johansson, and R. Roiban Department of Physics and Astronomy, UCLA, Los Angeles, California 90095-1547, USA SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, USA Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA (Received 25 May 2009; published 17 August 2009) We describe...
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We show that the four-loop four-point amplitudes of N = 5 supergravity are ultraviolet finite in four dimensions, contrary to expectations based on supersymmetry and duality-symmetry arguments. We explain why the diagrams of any covariant local formalism cannot manifestly exhibit the necessary cancellations for finiteness but instead require a new type of ultraviolet cancellation that we call a...
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We argue that recent results in string perturbation theory indicate that the four-graviton amplitude of four-dimensional N=8 supergravity might be ultraviolet finite up to eight loops. We similarly argue that the h-loop M-graviton amplitude might be finite for h<7+M/2.
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.98.086021