Generalized unitarity and six-dimensional helicity

Zvi Bern*, John Joseph Carrasco, Tristan Dennen, Yu Tin Huang, Harald Ita

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Scopus citations


We combine the unitarity method with the six-dimensional helicity formalism of Cheung and O'Connell to construct loop-level scattering amplitudes. As a first example, we construct dimensionally regularized QCD one-loop four-point amplitudes. As a nontrivial multiloop example, we confirm that the recently constructed four-loop four-point amplitude of N=4 super-Yang-Mills theory, including nonplanar contributions, is valid for dimensions D≤6. We comment on the connection of our approach to the recently discussed Higgs infrared regulator and on dual conformal properties in six dimensions.

Original languageEnglish (US)
Article number085022
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number8
StatePublished - Apr 21 2011

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Generalized unitarity and six-dimensional helicity'. Together they form a unique fingerprint.

Cite this