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Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes
UCLA, Dept Phys & Astron, Mani L Bhaumik Inst Theoret Phys, Los Angeles, CA 90095 USA..
CEA Saclay, Inst Phys Theor, F-91191 Gif Sur Yvette, France..
UCLA, Dept Phys & Astron, Mani L Bhaumik Inst Theoret Phys, Los Angeles, CA 90095 USA..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics. KTH Royal Inst Technol, Nordita, Roslagstullsbacken 23, S-10691 Stockholm, Sweden.;Stockholm Univ, Roslagstullsbacken 23, S-10691 Stockholm, 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
AMER PHYSICAL SOC , 2017. Vol. 118, no 18, 181602
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-323031DOI: 10.1103/PhysRevLett.118.181602ISI: 000400673100001PubMedID: 28524694OAI: oai:DiVA.org:uu-323031DiVA: diva2:1104852
Funder
EU, European Research Council, ERC-STG639729Swedish Research Council, 621-20145722Knut and Alice Wallenberg Foundation, KAW 2013.0235Ragnar Söderbergs stiftelse, S1/16
Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-02Bibliographically approved

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