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

Autor:	Chachamis, G., Hentschinski, M., Madrigal, J. D., Vera, A. Sabio
Rok vydání:	2013
Předmět:	High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	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. Comment: 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
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1307.7741 Zobrazit plný text záznamu View this record from Arxiv