A recursive method for SYM n-point tree amplitudes
arXiv:1012.3981 · doi:10.1103/PhysRevD.83.126012
Abstract
We present a recursive method for super Yang-Mills color-ordered n-point tree amplitudes based on the cohomology of pure spinor superspace in ten space-time dimensions. The amplitudes are organized into BRST covariant building blocks with diagrammatic interpretation. Manifestly cyclic expressions (no longer than one line each) are explicitly given up to n=10 and higher leg generalizations are straightforward.
7 pages, RevTeX; final version to appear in PRD