Theoretical precision in estimates of the hadronic contributions to (g-2)_mu and alpha_QED(M_Z)

Abstract

I review recent estimates of the non-perturbative hadronic vacuum polarization contributions. Since these at present can only be evaluated in terms of experimental data of limited precision, the related uncertainties pose a serious limitation in our ability to make precise predictions. Besides e+e- - annihilation data also tau decay spectra can help to get better predictions. Here, it is important to account for all possible iso-spin violations in tau - decay spectra, from which e+e- cross sections may be obtained by an iso-spin rotation. The observed 10% discrepancy in the region above the rho may be understood as a so far unaccounted iso-spin breaking effect.

10 pages, 2 tables, 4 figures

References in corpus (9)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.7 ppm
• Confronting Spectral Functions from e+e- Annihilation and tau Decays: Consequences for the Muon Magnetic Moment
• Measurement of e+e- -> pi+pi- cross section with CMD-2 around rho-meson
• Radiative return at NLO and the measurement of the hadronic cross-section in electron-positron annihilation
• Radiative tau decay and the magnetic moment of the muon
• Rhad: A program for the evaluation of the hadronic R-ratio in the perturbative regime of QCD
• A precise determination of the charm quark's mass in quenched QCD
• Measuring the FSR--inclusive pi+pi- cross section
• Scalar mesons and the muon anomaly

Cited by in corpus (25)

• Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data
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• The hadronic contributions to the anomalous magnetic moment of the muon
• WMAP constraints on SUGRA models with non-universal gaugino masses and prospects for direct detection
• A light complex scalar for the electron and muon anomalous magnetic moments
• Resolving electron and muon $g-2$ within the 2HDM
• Upgraded Breaking Of The HLS Model: A Full Solution to the tau-e+e- and phi Decay Issues And Its Consequences On g-2 VMD Estimates
• TeV Scale Mirage Mediation and Natural Little SUSY Hierarchy
• The Dipion Mass Spectrum In e+e- Annihilation and tau Decay: A Dynamical (rho0, omega, phi) Mixing Approach
• Low energy hadronic contribution to the QED vacuum polarization
• A Global Treatment Of VMD Physics Up To The $\varphi$: I. $e^{+}{e}^{-}$ Annihilations, Anomalies And Vector Meson Partial Widths
• Supersymmetry Simulations with Off-Shell Effects for LHC and ILC
• Analysis of enhanced tan(beta) corrections in MFV GUT scenarios
• Tuning and validation of hadronic event generator for $R$ value measurements in the tau-charm region
• Status of the Standard Model Prediction of the Muon g-2
• The Interplay Between Collider Searches For Supersymmetric Higgs Bosons and Direct Dark Matter Experiments
• Neutrino masses and magnetic moments of electron and muon in the Zee Model
• Constraints on the I=1 hadronic tau decay and e^+e^- --> hadrons data sets and implications for (g-2)_mu
• Hadronic Vacuum Polarization in True Muonium
• The improved 10th order QED expression for a_μ : new results and related estimates
• Iterative methods for overlap and twisted mass fermions
• Dark Matter and Collider Phenomenology with two light Supersymmetric Higgs Bosons
• Standard Model Predictions for the Muon $(g-2)/2$
• Hadronic and radiative decays of the tau lepton
• Study of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\omega$ process at center-of-mass energies between 4.0 and 4.6 GeV