Hadronic contributions to $(g-2)$ of the leptons and to the effective fine structure constant $\alpha (M_Z^2)$

Abstract

The hadronic contributions to the anomalous magnetic moments of the leptons and to the effective fine structure constant at the Z-mass are reevaluated using all presently available $e^{+}{e}^{-}$ data.

Comments: 36 pages, 11 Postscript figures, available at ftp://129.129.40.58/pub/preprints/vapogm2.ps.gz