The SM prediction of g-2 of the muon

Details The SM prediction of g-2 of the muon The SM prediction of g-2 of the muon

2002-09-17

arxiv.org/abs/hep-ph/0209187v2

Phys.Lett.B557:69-75,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX, 3 PostScript figures included. For completeness, we have added a recent prediction of the hadronic contributio

Scientific paper

10.1016/S0370-2693(03)00138-2

We calculate (g-2)/2 of the muon, by improving the determination of the hadronic vacuum polarisation contribution, a_mu^{had,LO}, and its uncertainties. The different e+e- data sets for each exclusive (and the inclusive) channel are combined in order to obtain the optimum estimate of the cross sections and their uncertainties. QCD sum rules are evaluated in order to resolve an apparent discrepancy between the inclusive data and the sum of the exclusive channels. We conclude a_mu^{had,LO}=(683.1 +- 5.9_{exp} +- 2.0_{rad}) 10^{-10} which, when combined with the other contributions to (g-2)/2, is about 3 sigma below the present world average measurement.

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