We present a new approach to Reggeization of gauge amplitudes based on the universal properties of their infrared singularities. Using the "dipole formula", a compact ansatz for all infrared singularities of massless amplitudes, we study Reggeization of singular contributions to high-energy amplitudes for arbitrary color representations, and any logarithmic accuracy. We derive leading-logarithmic Reggeization for general cross-channel color exchanges, and we show that Reggeization breaks down for the imaginary part of the amplitude at next-to-leading logarithms and for the real part at next-to-next-to-leading logarithms. Our formalism applies to multiparticle amplitudes in multi-Regge kinematics, and constrains possible corrections to the dipole formula starting at three loops.
@article{arxiv.1108.5947,
title = {An infrared approach to Reggeization},
author = {Vittorio Del Duca and Claude Duhr and Einan Gardi and Lorenzo Magnea and Chris D. White},
journal= {arXiv preprint arXiv:1108.5947},
year = {2013}
}