We discuss aspects of our recent derivation of the gluon Regge trajectory at two loop from Lipatov's high energy effective action. We show how the gluon Regge trajectory can be rigorously defined through renormalization of the high energy divergence of the reggeized gluon propagator. We furthermore provide some details on the determination of the two-loop reggeized gluon self-energy.
@article{arxiv.1308.0293,
title = {High energy factorization at NLO: Lipatov's effective action revisited},
author = {G. Chachamis and M. Hentschinski and J. D. Madrigal and A. Sabio Vera},
journal= {arXiv preprint arXiv:1308.0293},
year = {2015}
}
Comments
9 pages; to appear in the proceedings of the QCD Evolution Workshop, JLab, May 6th-10th, 2013