Gravity Amplitudes as Generalized Double Copies of Gauge-Theory AmplitudesReport as inadecuate

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1 Departement of Physics and Astronomy, UCLA 2 IPHT - Institut de Physique Théorique - UMR CNRS 3681 3 Uppsala University 4 Institute for Gravitation and the Cosmos

Abstract : Whenever the integrand of a gauge-theory loop amplitude can be arranged into a form where the BCJ 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 $\it N$=8 supergravity.

Keywords : kinematics color gravitation Jacobi identity duality: violation supergravity: 8 gauge field theory

Author: Zvi Bern - John Joseph Carrasco - Wei-Ming Chen - Henrik Johansson - Radu Roiban -



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