Predictions for g-2 of the muon and alpha(QED)(M(Z**2))

Hagiwara, K.; Martin, A.D.; Nomura, D.; Teubner, T.

doi:10.1103/physrevd.69.093003

Predictions for g-2 of the muon and alpha(QED)(M(Z**2))

Hagiwara, K.; Martin, A.D.; Nomura, D.; Teubner, T.

Authors

K. Hagiwara

A.D. Martin

D. Nomura

T. Teubner

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)×10–10 and amuhad,NLO = (–9.8±0.1exp±0.0rad)×10–10, and for the QED coupling Deltaalphahad(5)(MZ2) = (275.5±1.9exp±1.3rad)×10–4. 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.

Citation

Hagiwara, K., Martin, A., Nomura, D., & Teubner, T. (2004). Predictions for g-2 of the muon and alpha(QED)(M(Z**2)). Physical Review D, Particles and fields, 69, https://doi.org/10.1103/physrevd.69.093003

Journal Article Type	Article
Publication Date	2004-05
Deposit Date	Apr 28, 2008
Publicly Available Date	Apr 28, 2008
Journal	Physical Review D, Particles and fields
Print ISSN	0556-2821
Electronic ISSN	1089-4918
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	69
DOI	https://doi.org/10.1103/physrevd.69.093003