New results on the hadronic vacuum polarization to the muon g-2

Abstract

Results on the lowest-order hadronic vacuum polarization contribution to the muon magnetic anomaly are presented. They are based on the latest published experimental data used as input to the dispersion integral. Thus recent results on tau to nutau pi pi0 decays from Belle and on e+ e- annihilation to pi+ pi- from BABAR and KLOE are included. The new data, together with improved isospin-breaking corrections for tau decays, result into a much better consistency among the different results. A discrepancy between the Standard Model prediction and the direct g-2 measurement is found at the level of 3 sigma.

proceedings of the PhiPsi09 conference, Oct. 13-16, 2009, Beijing, China

References in corpus (11)

• Precise measurement of the e+ e- to pi+ pi- (gamma) cross section with the Initial State Radiation method at BABAR
• Improved predictions for g-2 of the muon and α_{\rm QED}(M_Z^2)
• Update of the e^+e^-\toπ^+π^- cross section measured by SND detector in the energy region 400<\sqrt{s}<1000 MeV
• Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e+e- -> pi+pi- cross section data from BABAR
• The Discrepancy Between tau and e+e- Spectral Functions Revisited and the Consequences for the Muon Magnetic Anomaly
• Measurement of the e+e- -> pi+pi- cross section with the CMD-2 detector in the 370-520 MeV c.m. energy range
• The hadronic contribution to (g-2) of the muon
• Long-distance radiative corrections to the di-pion tau lepton decay
• Spin asymmetries and correlations in lambda-pair production through the radiative return method
• The width difference of rho vector mesons
• Model-dependent radiative corrections to tau- -> pi- pi0 nu revisited

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