Computing the full two-loop gluon Regge trajectory within Lipatov's high energy effective action

• DOI: 10.48550/arxiv.1307.7741
• Publication Date: 2013-01-01
• Authors: Grigorios Chachamis; Martin Hentschinski; J.D. Madrigal Mar...; A. Sabio Vera
• Keywords: High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); 0103 physical sciences; FOS: Physical sciences; 01 natural sciences

We discuss computational details of our recent result, namely, the first derivation two-loop gluon Regge trajectory within framework Lipatov's high energy effective action. In particular, we elaborate on direct evaluation Feynman diagrams by using Mellin-Barnes representations technique. Our result is in precise agreement with previous computations literature, providing this way a highly non-trivial test action and proposed subtraction renormalization scheme combined approach for treatment loop diagrams.