Dissolving N=4 loop amplitudes into QCD tree amplitudes

Details Dissolving N=4 loop amplitudes into QCD tree amplitudes Dissolving N=4 loop amplitudes into QCD tree amplitudes

2004-12-21

arxiv.org/abs/hep-th/0412265v2

Phys.Rev.Lett. 94 (2005) 102002

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, revtex4. v2: minor changes, typo in (1) corrected

Scientific paper

10.1103/PhysRevLett.94.102002

We use the infrared consistency of one-loop amplitudes in N=4 Yang-Mills theory to derive a compact analytic formula for a tree-level NNMHV gluon scattering amplitude in QCD, the first such formula known. We argue that the IR conditions, coupled with recent advances in calculating one-loop box coefficients, can give a new tool for computing tree-level amplitudes in general. Our calculation suggests that many amplitudes have a structure which is even simpler than that revealed so far by current twistor-space constructions.

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