On a two-loop crossed six-line master integral with two massive lines

Abstract

We compute the two-loop crossed six-line vertex master integral with two massive lines in dimensional regularisation, and give the result up to the finite part in D-4. We focus in particular on the purely analytical calculation of the boundary condition which we derive from a three-fold Mellin-Barnes representation. We also describe how the computation of the boundary condition is used to derive three non-trivial relations among harmonic polylogarithms of the sixth root of unity.

10 pages, 1 figure. References added, minor modifications. Matches published version

References in corpus (5)

• Feynman Diagrams and Differential Equations
• NNLO Vertex Corrections in charmless hadronic B decays: Imaginary part
• NNLO corrections to inclusive semileptonic B decays in the shape-function region
• The Two Loop Crossed Ladder Vertex Diagram with Two Massive Exchanges
• NNLO corrections to B --> X_u l nu in the shape-function region

Cited by in corpus (1)

• NNLO vertex corrections in charmless hadronic B decays: Real part