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

35 Citations (Scopus)

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

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gauge theory
gravitation
supergravity
kinematics
color

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Bern, Zvi ; Carrasco, John Joseph ; Chen, Wei Ming ; Johansson, Henrik ; Roiban, Radu. / Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes. In: Physical Review Letters. 2017 ; Vol. 118, No. 18.
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Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes. / Bern, Zvi; Carrasco, John Joseph; Chen, Wei Ming; Johansson, Henrik; Roiban, Radu.

In: Physical Review Letters, Vol. 118, No. 18, 181602, 05.05.2017.

Research output: Contribution to journalArticle

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