Infrared singularities of QCD scattering amplitudes in the Regge limit to all orders
Open Access
- 16 March 2018
- journal article
- research article
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2018 (3) , 98
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 analyse the infraredsingular 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.Keywords
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