Predictions for g-2 of the muon and alpha_QED(M_Z^2)
| dc.creator | Hagiwara, K. | |
| dc.creator | Martin, A. D. | |
| dc.creator | Nomura, Daisuke | |
| dc.creator | Teubner, T. | |
| dc.date | 2003-12-18 | |
| dc.date | 2004-04-28 | |
| dc.date.accessioned | 2026-07-07T12:03:05Z | |
| dc.date.available | 2026-07-07T12:03:05Z | |
| dc.description | We calculate (g-2) of the muon and the QED coupling alpha(M_Z^2), by improving the determination of the hadronic vacuum polarization contributions and their uncertainties. We include the recently re-analysed 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) = sigma_had^0(s)/sigma_pt(s), together with its uncertainty. Our results for the hadronic contributions to g-2 of the muon are a_mu^(had, LO) = (692.4 +- 5.9_exp +- 2.4_rad) * 10^(-10) and a_mu^(had, NLO) = (-9.8 +- 0.1_exp +- 0.0_rad) * 10^(-10), and for the QED coupling Delta alpha^(5)_had (M_Z^2)= (275.5 +- 1.9_exp +- 1.3_rad) * 10^(-4). These yield (g-2)/2 = 0.00116591763(74), which is about 2.4 sigma below the present world average measurement, and alpha(M_Z^2)^(-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. | |
| dc.description | 83 pages, 10 Tables, LaTeX, 28 PostScript figures included. Electromagnetic contributions updated; two Refs. added and typos corrected. Version to appear in Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0312250 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0312250 | |
| dc.identifier | Phys.Rev.D69:093003,2004 | |
| dc.identifier | doi:10.1103/PhysRevD.69.093003 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207663 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Predictions for g-2 of the muon and alpha_QED(M_Z^2) | |
| dc.type | text |