Lipatov's high-energy effective action is a useful tool for computations in the Regge limit beyond leading order. Recently, a regularisation/subtraction prescription has been proposed that allows to apply this formalism to calculate next-to-leading order corrections in a consistent way. We illustrate this procedure with the computation of the gluon Regge trajectory at two loops.
@article{arxiv.1206.5101,
title = {Two-Loop Gluon Regge Trajectory from Lipatov's Effective Action},
author = {Grigorios Chachamis and Martin Hentschinski and José Daniel Madrigal and Agustín Sabio Vera},
journal= {arXiv preprint arXiv:1206.5101},
year = {2012}
}
Comments
4 pages, 5 figures, Proceedings of the XX Workshop on Deep-Inelastic Scattering and Related Subjects, 26-30 March, University of Bonn (2012)