Small-threshold behaviour of two-loop self-energy diagrams: some special cases
arXiv:hep-ph/9606244 · doi:10.1016/S0920-5632(96)90040-7
Abstract
An algorithm to construct analytic approximations to two-loop diagrams describing their behaviour at small non-zero thresholds is discussed. For some special cases (involving two different-scale mass parameters), several terms of the expansion are obtained.
7 pages, plain latex; talk given at DESY-Zeuthen Workshop "QCD and QED in Higher Order", Rheinsberg, April 1996, to appear in Proceedings