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.
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ArXiv ePrint: 1711.04850
In memory of Lev Nikolaevich Lipatov and his pioneering contributions.
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Caron-Huot, S., Gardi, E., Reichel, J. et al. Infrared singularities of QCD scattering amplitudes in the Regge limit to all orders. J. High Energ. Phys. 2018, 98 (2018). https://doi.org/10.1007/JHEP03(2018)098
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DOI: https://doi.org/10.1007/JHEP03(2018)098