Preprint 2015-15
Johannes Broedel and Martin Sprenger
Six-point remainder function in multi-Regge-kinematics: an efficient approach in momentum space.
Abstract: Starting from the known all-order expressions for the BFKL eigenvalue and impact factor, we establish a formalism allowing the direct calculation of the sixpoint
remainder function in N = 4 super-Yang–Mills theory in momentum space to – in principle – all orders in perturbation theory. Based upon identities which relate different integrals contributing to the inverse Fourier-Mellin transform recursively, the formalism allows to easily access the full remainder function in multi-Regge kinematics up to 7 loops and up to 10 loops in the fourth logarithmic order. Using the formalism, we prove the all-loop formula for the leading logarithmic approximation proposed by Pennington and investigate the behavior of several newly calculated functions.
Preprint series: Institut für Mathematik, Humboldt-Universität zu Berlin (ISSN 0863-0976), 2015-15
28 pp.