K. Hagiwara
Predictions for g-2 of the muon and alpha(QED)(M(Z**2))
Hagiwara, K.; Martin, A.D.; Nomura, D.; Teubner, T.
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 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 69 |
DOI | https://doi.org/10.1103/physrevd.69.093003 |
Public URL | https://durham-repository.worktribe.com/output/1593370 |
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