Positive helicity Einstein-Yang-Mills amplitudes from the double copy method

Dec 10, 2018
17 pages
Published in:
  • Phys.Rev.D 99 (2019) 4, 046008
  • Published: Feb 16, 2019
e-Print:
Report number:
  • HU-EP-18/36

Citations per year

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Abstract: (APS)
All positive helicity four-point gluon-graviton amplitudes in Einstein-Yang-Mills theory coupled to a dilaton and axion field are computed at the leading one-loop order using color-kinematics duality. In particular, all relevant contributions in the gravitational and gauge coupling are established. This extends a previous generalized unitarity based computation beyond the leading terms in the gravitational coupling κ. The resulting purely rational expressions take very compact forms. The previously seen vanishing of the single-graviton-three-gluon amplitude at leading order in κ is seen to be lifted at order κ3.
Note:
  • 28 pages, many figures. v2: references added; v3 references added typos corrected, version to be published in PRD
  • String theory, quantum gravity, gauge/gravity duality
  • gravitation: coupling
  • coupling: gauge
  • higher-order: 1
  • Einstein-Yang-Mills theory
  • helicity
  • duality
  • dilaton
  • axion
  • scattering amplitude