Abstract
The Operator Product Expansion is a useful tool to represent correlation functions. In this note we extend Conformal Regge theory to provide an exact OPE representation of Lorenzian four-point correlators in conformal field theory, valid even away from Regge limit. The representation extends convergence of the OPE by rewriting it as a double integral over continuous spins and dimensions, and features a novel “Regge block”. We test the formula in the conformal fishnet theory, where exact results involving nontrivial Regge trajectories are available.
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Caron-Huot, S., Sandor, J. Conformal Regge theory at finite boost. J. High Energ. Phys. 2021, 59 (2021). https://doi.org/10.1007/JHEP05(2021)059
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DOI: https://doi.org/10.1007/JHEP05(2021)059