Dissolving script N sign = 4 loop amplitudes into QCD tree amplitudes

Radu Roiban, Marcus Spradlin, Anastasia Volovich

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


We use the infrared consistency of one-loop amplitudes in script N sign = 4 Yang-Mills theory to derive a compact analytic formula for a tree-level next-to-next-to-maximal helicity-violating gluon scattering amplitude in QCD, the first such formula known. We argue that the infrared 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.

Original languageEnglish (US)
Article number102002
JournalPhysical review letters
Issue number10
StatePublished - Mar 18 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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