Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes

Zvi Bern, John Joseph Carrasco, Wei Ming Chen, Henrik Johansson, Radu Roiban

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

Whenever the integrand of a gauge-theory loop amplitude can be arranged into a form where the Bern-Carrasco-Johansson duality between color and kinematics is manifest, a corresponding gravity integrand can be obtained simply via the double-copy procedure. However, finding such gauge-theory representations can be challenging, especially at high loop orders. Here, we show that we can, instead, start from generic gauge-theory integrands, where the duality is not manifest, and apply a modified double-copy procedure to obtain gravity integrands that include contact terms generated by violations of dual Jacobi identities. We illustrate this with three-, four- and five-loop examples in N=8 supergravity.

Original languageEnglish (US)
Article number181602
JournalPhysical review letters
Volume118
Issue number18
DOIs
StatePublished - May 5 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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