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Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Uppsala University, Sweden.
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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
American Physical Society , 2017. Vol. 118, no 18, 181602
Keyword [en]
Atomic physics, Physics, Gauge theory, Loop order, Supergravity, Quantum theory
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-216499DOI: 10.1103/PhysRevLett.118.181602ISI: 000400673100001Scopus ID: 2-s2.0-85019029296OAI: oai:DiVA.org:kth-216499DiVA: diva2:1161999
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QC 20171201

Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2017-12-01Bibliographically approved

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