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Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
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Number of Authors: 5
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 118, no 18, 181602Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2017. Vol. 118, no 18, 181602
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Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-143450DOI: 10.1103/PhysRevLett.118.181602ISI: 000400673100001PubMedID: 28524694OAI: oai:DiVA.org:su-143450DiVA: diva2:1106344
Available from: 2017-06-07 Created: 2017-06-07 Last updated: 2017-06-07Bibliographically approved

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