Infrared singularities of QCD scattering amplitudes in the Regge limit to all orders

Simon Caron-Huot, Einan Gardi, Joscha Reichel, Leonardo Vernazza

Research output: Contribution to journalArticlepeer-review

Abstract

Scattering amplitudes of partons in QCD contain infrared divergences which can be resummed to all orders in terms of an anomalous dimension. Independently, in the limit of high-energy forward scattering, large logarithms of the energy can be resummed using Balitsky-Fadin-Kuraev-Lipatov theory. We use the latter to analyze the infrared-singular part of amplitudes to all orders in perturbation theory and to next-to-leading-logarithm accuracy in the high-energy limit, resumming the two-Reggeon contribution. Remarkably, we find a closed form for the infrared-singular part, predicting the Regge limit of the soft anomalous dimension to any loop order.
Original languageEnglish
Article number98
Pages (from-to)1-34
Number of pages34
Journal Journal of High Energy Physics
VolumeN/A
Early online date16 Mar 2018
DOIs
Publication statusE-pub ahead of print - 16 Mar 2018

Keywords

  • hep-ph
  • hep-th

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