Thursday, May 31, 2012

1205.6705 (Andreas Brandhuber et al.)

A note on amplitudes in N=6 superconformal Chern-Simons theory    [PDF]

Andreas Brandhuber, Gabriele Travaglini, Congkao Wen
We establish a connection between tree-level superamplitudes in ABJM theory and leading singularities associated to special three-particle cuts of one-loop superamplitudes where one of the tree amplitudes entering the cut is a four-point amplitude. Using these relations, we show that certain intriguing similarities between one-loop and tree-level superamplitudes observed recently become completely manifest. This connection is reminiscent of a similar relation in the maximally supersymmetric gauge theory in four dimensions, where the sum of two-mass hard and one-mass box coefficients of a one-loop amplitude equals the corresponding tree-level amplitude. As an application, we present a very simple re-derivation of the six-point superamplitude and calculate the eight-point superamplitude at one loop in ABJM theory.
View original: http://arxiv.org/abs/1205.6705

No comments:

Post a Comment