4.4 Article

Gravitational S-matrix from CFT dispersion relations

Journal

JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 12, Pages -

Publisher

SPRINGER
DOI: 10.1007/JHEP12(2018)017

Keywords

AdS-CFT Correspondence; Conformal Field Theory; 1/N Expansion; Supersymmetric Gauge Theory

Funding

  1. ERC STG grant [306260]
  2. National Science and Engineering Council of Canada

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We analyse the double-discontinuities of the four-point correlator of the stress-tensor multiplet in N=4 SYM at large t' Hooft coupling and at order 1/N-4, as a way to access one-loop effects in the dual supergravity theory. From these singularities we extract CFT-data by using two inversion procedures: one based on a recently proposed Froissart-Gribov inversion integral, and the other based on large spin perturbation theory. Both procedures lead to the same results and are shown to be equivalent more generally. Our computation parallels the standard S-matrix reconstruction via dispersion relations. In a suitable limit, the result of the conformal field theory calculation is compared with the one-loop graviton scattering amplitude in ten-dimensional IIB supergravity in flat space, finding perfect agreement.

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