Hadronic effects in (g-2)_mu and alpha_QED (M_Z): Status and perspectives
High Energy Physics - Phenomenology
2007-05-23 v1
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 (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.
Keywords
Cite
@article{arxiv.hep-ph/9901386,
title = {Hadronic effects in (g-2)_mu and alpha_QED (M_Z): Status and perspectives},
author = {F. Jegerlehner},
journal= {arXiv preprint arXiv:hep-ph/9901386},
year = {2007}
}
Comments
16 pages, 5 figures; presented at the IVth Intern. Symposium on Radiative Corrections, Barcelona, September 1998