169 citations · 471 across the 7 of their papers we have counts for
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Proof of the MHV vertex expansion for all tree amplitudes in N=4 SYM theory
Henriette Elvang, Daniel Z. Freedman, Michael Kiermaier
We prove the MHV vertex expansion for all tree amplitudes of N=4 SYM theory. The proof uses a shift acting on all external momenta, and we show that every N^kMHV tree amplitude fal…
Recursion Relations, Generating Functions, and Unitarity Sums in N=4 SYM Theory
Henriette Elvang, Daniel Z. Freedman, Michael Kiermaier
We prove that the MHV vertex expansion is valid for any NMHV tree amplitude of N=4 SYM. The proof uses induction to show that there always exists a complex deformation of three ext…
Generating Tree Amplitudes in N=4 SYM and N=8 SG
Massimo Bianchi, Henriette Elvang, Daniel Z. Freedman
We study n-point tree amplitudes of N=4 super Yang-Mills theory and N=8 supergravity for general configurations of external particles of the two theories. We construct generating f…
Note on graviton MHV amplitudes
Henriette Elvang, Daniel Z. Freedman
Two new formulas which express n-graviton MHV tree amplitudes in terms of sums of squares of n-gluon amplitudes are discussed. The first formula is derived from recursion relations…
From Fake Supergravity to Superstars
Henriette Elvang, Daniel Z. Freedman, Hong Liu
The fake supergravity method is applied to 5-dimensional asymptotically AdS spacetimes containing gravity coupled to a real scalar and an abelian gauge field. The motivation is to…
Anomaly Cancellation in Supergravity with Fayet-Iliopoulos Couplings
Henriette Elvang, Daniel Z. Freedman, Boris Kors
We review and clarify the cancellation conditions for gauge anomalies which occur when N=1, D=4 supergravity is coupled to a Kahler non-linear sigma-model with gauged isometries an…