Publication : t08/057
Absence of Triangles in Maximal Supergravity Amplitudes
Bjerrum-Bohr N.E.J. (Institute for Advanced Study (IAS), Einstein Drive, Princeton, New Jersey 08540, USA)Vanhove P. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Abstract:Année de publication : 2008
From general arguments, we show that one-loop n-point amplitudes in colourless theories satisfy a new type of reduction formula. These lead to the existence of cancellations beyond supersymmetry. Using such reduction relations we prove the no-triangle hypothesis in maximal supergravity by showing that in four dimensions the n-point graviton amplitude contain only scalar box integral functions. We also discuss the reduction formulas in the context of gravity amplitudes with less and no supersymmetry.
Revue : JHEP 0810 006 (2008)
DOI : 10.1088/1126-6708/2008/10/006
Preprint : arXiv:0805.3682
Lien : http://www.iop.org/EJ/abstract/1126-6708/2008/10/006/
Langue : Anglais
Fichier(s) à télécharger :
1126-6708_2008_10_006.pdf
