Amplitudes and ultraviolet behavior of N = 8 supergravity
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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In these lectures I describe the remarkable ultraviolet behavior of N = 8 supergravity, which through four loops is no worse than that of N = 4 super-Yang-Mills theory (a finite theory). I also explain the computational tools that allow multi-loop amplitudes to be evaluated in this theory — the KLT relations and the unitarity method — and sketch how ultraviolet divergences are extracted from th...
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We present the explicit expressions in N=8 supergravity for the bosonic 4-particle tree and 1-loop amplitudes including vectors and scalars. We also present the candidate 4point UV divergences in a form of helicity amplitudes, corresponding to 3-loop manifestly N=8 supersymmetric and Lorentz covariant counterterm. This may shed some light on the 3-loop finiteness of N=8 SG and on a conjectured ...
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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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ژورنال
عنوان ژورنال: Fortschritte der Physik
سال: 2011
ISSN: 0015-8208
DOI: 10.1002/prop.201100037