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Unraveling conformal gravity amplitudes

Jun 13, 2018
47 pages
Published in:
  • JHEP 09 (2018) 080
  • Published: Sep 14, 2018
e-Print:
DOI:
Report number:
  • UUITP-24/18,
  • NORDITA 2018-042,
  • UUITP-24-18,
  • NORDITA-2018-042
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Abstract: (Springer)
Conformal supergravity amplitudes are obtained from the double-copy construction using gauge-theory amplitudes, and compared to direct calculations starting from conformal supergravity Lagrangians. We consider several different theories: minimal N=4 \mathcal{N}=4 conformal supergravity, non-minimal N=4 \mathcal{N}=4 Berkovits-Witten conformal supergravity, mass-deformed versions of these theories, as well as supersymmetry truncations thereof. Coupling the theories to a Yang-Mills sector is also considered. For all cases we give the gravity Lagrangians that the double copy implicitly generates. The two main results are: we determine a Lagrangian for the non-minimal Berkovits-Witten theory, and we uncover the double-copy prescription for the minimal N=4 \mathcal{N}=4 conformal supergravity.
Note:
  • 32 pages, plus appendices and references; v2 minor changes
  • Scattering amplitudes
  • supergravity
  • gauge symmetry
  • Scattering Amplitudes
  • Conformal Field Theory
  • Supergravity Models
  • supergravity: conformal
  • gravitation: conformal
  • nonminimal
  • gauge field theory