O(α_s^2) Corrections to Current Correlators

Abstract

In this contribution three-loop QCD corrections to current correlators are considered. The application of the large momentum procedure, which provides a systematic expansion in $(m^2/q^2{)}^n$, allows the computation of terms up to $n=6$ for the vector and axial-vector correlator and up to $n=4$ for the scalar and pseudo-scalar correlator. Some physical applications are discussed.

3 pages (Latex), 2 figures (Postscript), to appear in the Proceedings of the International Europhysics Conference on High Energy Physics, Jerusalem, Israel, 19 - 26 August 1997