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Publication details for Alan Martin

Hagiwara, K., Martin, A. D., Nomura, D. & Teubner, T. (2004). Predictions for g-2 of the muon and alpha(QED)(M(Z**2). Physical Review D 69: 093003.

Author(s) from Durham

Abstract

We calculate g�2 of the muon and the QED coupling alpha(MZ2), by improving the determination of the hadronic vacuum polarization contributions and their uncertainties. We include the recently reanalyzed CMD-2 data on e+e�-->pi+pi�. We carefully combine a wide variety of data for the e+e� production of hadrons and obtain the optimum form of R(s)[equivalent]sigmahad0(s)/sigmapt(s), together with its uncertainty. Our results for the hadronic contributions to g�2 of the muon are amuhad,LO = (692.4�5.9exp�2.4rad)ױ0�10 and amuhad,NLO = (�9.8�0.1exp�0.0rad)ױ0�10, and for the QED coupling Deltaalphahad(5)(MZ2) = (275.5�1.9exp�1.3rad)ױ0�4. These yield (g�2)/2 = 0.00116591763(74), which is about 2.4sigma below the present world average measurement, and alpha(MZ2)�1 = 128.954�0.031. We compare our g�2 value with other predictions and, in particular, make a detailed comparison with the latest determination of g�2 by Davier et al.

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