Hadronic effects in (g-2)_mu and alpha_QED (M_Z): Status and perspectives

Details Hadronic effects in (g-2)_mu and alpha_QED (M_Z): Status and perspectives Hadronic effects in (g-2)_mu and alpha_QED (M_Z): Status and perspectives

1999-01-22

arxiv.org/abs/hep-ph/9901386v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures; presented at the IVth Intern. Symposium on Radiative Corrections, Barcelona, September 1998

Scientific paper

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 (M_Z). A new estimate for the hadronic shift delta_alpha hadronic = 0.027782 +/- 0.000254 is presented which implies 1/alpha (M_Z) = 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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