Note on graviton MHV amplitudes
Henriette Elvang, Daniel Z. Freedman
TL;DR
This paper presents two new formulas for n-graviton MHV tree amplitudes expressed as sums of squares of n-gluon amplitudes, derived from recursion relations and a simplified Berends-Giele-Kuijf formula.
Contribution
It introduces novel formulas for graviton MHV amplitudes that simplify calculations by relating them to gluon amplitudes, one derived from recursion and the other from a variant of existing formulas.
Findings
Two new formulas for graviton MHV amplitudes
One formula derived from recursion relations
A simpler formula based on a variant of Berends-Giele-Kuijf formula
Abstract
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. The second formula, simpler because it involves fewer permutations, is obtained from the variant of the Berends, Giele, Kuijf formula given in Arxiv:0707.1035.
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