High-energy evolution to three loops
Caron-Huot, S., & Herranen, M. (2018). High-energy evolution to three loops. Journal of High Energy Physics, 2018 (2), 58. doi:10.1007/JHEP02(2018)058
Julkaistu sarjassaJournal of High Energy Physics
© 2018 The Authors. Article funded by SCOAP3. This is an open access article distributed under the terms of the Creative Commons License.
The Balitsky-Kovchegov equation describes the high-energy growth of gauge theory scattering amplitudes as well as nonlinear saturation effects which stop it. We obtain the three-loop corrections to the equation in planar N = 4 super Yang-Mills theory. Our method exploits a recently established equivalence with the physics of soft wide-angle radiation, so-called non-global logarithms, and thus yields at the same time the threeloop evolution equation for non-global logarithms. As a by-product of our analysis, we develop a Lorentz-covariant method to subtract infrared and collinear divergences in crosssection calculations in the planar limit. We compare our result in the linear regime with a recent prediction for the so-called Pomeron trajectory, and compare its collinear limit with predictions from the spectrum of twist-two operators.