Hadronic Contribution to (g-2)_{mu}

Details Hadronic Contribution to (g-2)_{mu} Hadronic Contribution to (g-2)_{mu}

2001-11-20

arxiv.org/abs/hep-ph/0111243v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the ``XXXVIth Rencontres de Moriond'': Electroweak Interactions and Unified Theories, Les Arcs (France), March 1

Scientific paper

The recent precise measurement of the muon magnetic anomaly (g-2)_{mu} at BNL opens a window into possible new physics, provided the contribution from hadronic vacuum polarization is well understood. This talk summarizes the development in the evaluation of the leading order hadronic contributions. Significant improvement has been achieved in a series of analyses which is presented historically in three steps: (1), use of tau spectral functions in addition to e+e- cross sections, (2), extended use of perturbative QCD and (3), application of QCD sum rule techniques. The uncertainties, in particular concerning the CVC hypothesis used in step (1), and global quark-hadron duality employed in steps (2) and (3) are discussed. No new analysis results are given in these proceedings.

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