Heavy Quark Current Correlators to O(α_s^2)

Abstract

In this paper the three-loop polarization functions Π(q^2) are calculated for the cases of an external vector, axial-vector, scalar or pseudo-scalar current. Results are presented for the imaginary part which directly leads to the cross section $\sigma (e^{+}{e}^{-}\to Z\to hadrons)$ and to the Higgs decay rates, respectively.

Latex, 38 pages, 44 ps-figures. The complete paper, including figures, is also available via anonymous ftp at ftp://ttpux2.physik.uni-karlsruhe.de/ , or via www at http://www-ttp.physik.uni-karlsruhe.de/cgi-bin/preprints/

References in corpus (2)

• Mass Corrections to the Tau Decay Rate
• Higgs Decay to Top Quarks at O(α_s^2)

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