Computing the full two-loop gluon Regge trajectory within Lipatov's high energy effective action
Abstract
We discuss computational details of our recent result, namely, the first derivation of the two-loop gluon Regge trajectory within the framework of Lipatov's high energy effective action. In particular, we elaborate on the direct evaluation of Feynman two-loop diagrams by using the Mellin-Barnes representations technique. Our result is in precise agreement with previous computations in the literature, providing this way a highly non-trivial test of the effective action and the proposed subtraction and renormalization scheme combined with our approach for the treatment of the loop diagrams.
Cite
@article{arxiv.1307.7741,
title = {Computing the full two-loop gluon Regge trajectory within Lipatov's high energy effective action},
author = {G. Chachamis and M. Hentschinski and J. D. Madrigal and A. Sabio Vera},
journal= {arXiv preprint arXiv:1307.7741},
year = {2013}
}
Comments
6 pages, to appear in the proceedings of the XXI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2013), Marseille, 22-26 April 2013