TTP96-32 Threshold behavior of Feynman diagrams: the master two-loop propagator

TTP96-32 Threshold behavior of Feynman diagrams: the master two-loop propagator

TTP96-32 Threshold behavior of Feynman diagrams: the master two-loop propagator

An asymptotic expansion of the two-loop two-point master'' diagram with two masses $m$ and $M$, on the mass shell $Q^2=M^2$, is presented. The treatment of the non-analytical terms arising in the expansion around the branching point is discussed. Some details of the calculation of a new class of two-loop integrals are given.

 Andrzej Czarnecki and Vladimir A. Smirnov Phys. Lett. B 394 211 1997 PDF PostScript arXiv