Improved predictions for g−2 of the muon and αQED(MZ2)

2006/11/30 by K. Hagiwara, A. D. Martin, Daisuke Nomura +1 · 13 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/j.physletb.2007.04.012

published as Phys.Lett.B649:173-179,2007 · 12 pages, 5 figures. Version to be published in Phys. Lett. B

openalex publication_date 2007/04/17 · arxiv created 2007/04/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We update the Standard Model predictions of the anomalous magnetic moment of the muon, a_μ= (g-2)/2, and the value of the QED coupling at the Z-boson mass, incorporating the new e⁺e^- → ππdata obtained by CMD-2 and KLOE, as well as the corrected SND data, and other improvements. The prediction for a_μ=11659180.4 (5.1) × 10^-10 is about 3 × 10^-10 lower than before, and has a smaller uncertainty, which corresponds to a 3.4σdeviation from the measured value. The prediction for the QED coupling is α(M_Z²)^-1= 128.937 ± 0.030.

Citations

• Measurement of σ(e+e−→π+π−γ) and extraction of σ(e+e−→π+π−) below 1 GeV with the KLOE detector
• Hadronic vacuum polarization effects in alpha_em(M_Z)
• The muon magnetic moment and supersymmetry
• Study of thee+e−→π+π−π0process using initial state radiation withBABAR
• Review of Particle Physics
• Upper Bound on the Hadronic Light-By-Light Contribution to the Muong−2
• New Determination of the Fine Structure Constant from the ElectrongValue and QED
• Measurements of the cross sections for e+e−→hadrons at 3.650, 3.6648, 3.773 GeV and the branching fraction for ψ(3770)→non-DD¯

Cited by

• Effects of new leptons in electroweak precision data
• Fitting the phenomenological MSSM
• Naturalness and focus points with non-universal gaugino masses
• Physics at a future Neutrino Factory and super-beam facility
• Resurrecting no-scale supergravity phenomenology
• Phenomenology of GUT-less supersymmetry breaking
• Neutrino signals from solar neutralino annihilations in anomaly mediated supersymmetry breaking model
• The muong−2and the bounds on the Higgs boson mass
• Prospects for the direct detection of neutralino dark matter in orbifold scenarios
• NMSSM neutralino dark matter
• CODATA recommended values of the fundamental physical constants: 2006
• CODATA Recommended Values of the Fundamental Physical Constants: 2010
• Muon [wikipedia]