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
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