Analytical Result for Dimensionally Regularized Massless Master Double Box with One Leg off Shell
Abstract
Description
The dimensionally regularized massless double box Feynman diagram with powers of propagators equal to one, one leg off the mass shell, i.e. with non-zero q^2=p_1^2, and three legs on shell, p_i^2=0, i=2,3,4, is analytically calculated for general values of q^2 and the Mandelstam variables s and t. An explicit result is expressed through (generalized) polylogarithms, up to the fourth order, dependent on rational combinations of q^2,s and t, and a one-dimensional integral with a simple integrand consisting of logarithms and dilogarithms.
10 pages, LaTeX with axodraw.sty, one reference is corrected
10 pages, LaTeX with axodraw.sty, one reference is corrected