$ϵ$-Expansion for non-planar double-boxes

Abstract

We present calculations for non-planar double-box with four massless/massive external/internal legs/propagators. The results are expressed for arbitrary exponents of propagators and dimension in terms of Lauricella's hypergeometric functions of three variables and hypergeometric-like multiple series.

Comments: 12 pages, JHEP LATEX style. V2: reference [10] corrected