Hadronic effects in (g-2)mu and alphaQED (MZ): Status and perspectives
F. Jegerlehner
Abstract
I review recent evaluations of the hadronic contributions to the muon anomalous magnetic moment (g-2)mu and to the effective fine structure constant alpha (MZ). A new estimate for the hadronic shift deltaalpha hadronic = 0.027782 +/- 0.000254 is presented which implies 1/alpha (MZ) = 128.913 +/- 0.035. It is based on a recent perturbative calculation of the Adler function which includes mass effects up to three-loops in a MOM scheme and requires little ad hoc assumptions. I then discuss perspectives for possible improvements in estimations of g-2 which we expect from the Phi--factory DAPHNE at Frascati.
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