Muon and tau anomalies updated

Abstract

We present a new independent evaluation of the hadronic vacuum polarization contributions a_l{had}(l.o)=(1/2)(g-2)_l{had}(l.o) to the anomalous magnetic moment (anomaly) of the muon and tau leptons using tau-decays and e+e- data. The alone theoretical input used for describing the high-energy region not accessible experimentally is perturbative QCD plus (negligible) additional effects due to the QCD vacuum condensates. We obtain: a_mu{had}(l.o)= 7020.6(75.6)10^{-11} and a_tau{had}(l.o)= 353.6(3.8)10^{-8}, which we compare with previous determinations. Our analysis leads to the Standard Model (SM) prediction: a_mu^{SM}=116~591~846.9(78.9)10^{-11}.Confronting a_mu^{SM} with the recent BNL measurement leads to a_mu{new}= a_mu{exp}-a_mu{SM}=176(170)10^{-11}. Combined with the mean existing determinations of a_mu^{had}(l.o), this leads to the conservative range: -42 < a_mu{new}10^{11} < 413 at 90% CL, from which we derive conservative lower bounds on the scales of some new physics. We also update our old predictions of the SM contributions to a_tau. Including QED to sixth order, higher order hadronic and electroweak contributions, we obtain a_tau{SM}=117 755(7)10^{-8}, waiting for a future precise measurement of a_tau.

More comments, few corrections and references added. Recent changes compared with the published version will appear as an Erratum to PLB 513 (2001) 53

References in corpus (1)

• V-A hadronic tau decays : a QCD laboratory

Cited by in corpus (68)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.7 ppm
• Hadronic light-by-light corrections to the muon g-2: the pion-pole contribution
• Dark Matter Detection in the Light of Recent Experimental Results
• Constraints on the Minimal Supergravity Model and Prospects for SUSY Particle Production at Future Linear e^+ e^- Colliders
• Gauged $L_{\mu }-L_{\tau }$ with Large Muon Anomalous Magnetic Moment and the Bimaximal Mixing of Neutrinos
• Supersymmetric Dark Matter and Yukawa Unification
• Predictions for g-2 of the muon and alpha_QED(M_Z^2)
• The Standard Model Prediction of the Muon Anomalous Magnetic Moment
• The hadronic contributions to the anomalous magnetic moment of the muon
• Updated Constraints on the Minimal Supergravity Model
• Updated Constraints on the Minimal Supergravity Model
• Theory of the tau lepton anomalous magnetic moment
• Electroweak Hadronic Contributions to the muon g-2
• Constraining Supersymmetry
• Radiative tau decay and the magnetic moment of the muon
• The Tenth-Order QED Contribution to the Lepton g-2: Evaluation of Dominant ${\alpha }^5$ Terms of Muon g-2
• Hadronic Light-by-Light Contribution to Muon g-2 in Chiral Perturbation Theory
• Precision Determination of the Pion Form Factor and Calculation of the Muon $g-2$
• Muon Anomalous Magnetic Moment, Two-Higgs-Doublet Model, and Supersymmetry
• Improved ${\alpha }^4$ Term of the Muon Anomalous Magnetic Moment
• Higgs-mediated leptonic decays of B_s and B_d mesons as probes of supersymmetry
• Global Electroweak Fits and Gauge Coupling Unification
• Discovering anomaly-mediated supersymmetry at the LHC
• Precise mass-dependent QED contributions to leptonic g-2 at order alpha^2 and alpha^3
• $b-\tau$ Unification, $g_{\mu }-2$, the $b\to s+\gamma$ Constraint and Nonuniversalities
• Strange quark mass from e+e- revisited and present status of light quark masses
• Upper and Lower Limits on Neutralino WIMP Mass and Spin--Independent Scattering Cross Section, and Impact of New (g-2)_{mu} Measurement
• Genetic Algorithms and Experimental Discrimination of SUSY Models
• Two-loop Barr-Zee type Contributions to $(g-2{)}_{\mu }$ in the MSSM
• Adler function and hadronic contribution to the muon g-2 in a nonlocal chiral quark model
• Scalar and pseudoscalar meson pole terms in the hadronic light-by-light contributions to $a_{\mu }^{had}$
• Search for Yukawa Production of a Light Neutral Higgs Boson at LEP
• Electron, muon and tau magnetic moments: a theoretical update
• Selecting Supersymmetric String Scenarios From Sparticle Spectra
• Updated Implications of the Muon Anomalous Magnetic Moment for Supersymmetry
• Implications of the Muon Anomalous Magnetic Moment for Supersymmetry
• Lepton Dipole Moments and Rare Decays in the CP-violating MSSM with Nonuniversal Soft-Supersymmetry Breaking
• Scalar mesons and the muon anomaly
• Interpreting the New Brookhaven g_mu - 2 Result
• Anomalous Neutrino Interaction, Muon g-2, and Atomic Parity Nonconservation
• Hadronic effects in leptonic systems: muonium hyperfine structure and anomalous magnetic moment of muon
• Update on very light CP-odd scalar in the Two-Higgs-Doublet Model
• Resummations with renormalon effects for the hadronic vacuum polarization contribution to the muon (g-2)
• The three-loop QED contributions to the $g-2$ of charged leptons with two internal fermion loops and a class of Kampé de Fériet series
• Strange Quark, Tachyonic Gluon Masses and V_{us} from Hadronic Tau Decays
• Noncommutative QED and Muon Anomalous Magnetic Moment
• Yukawa Textures and Anomaly Mediated Supersymmetry Breaking
• The tau lepton anomalous magnetic moment
• D-term challenges for supersymmetric gauged abelian flavor symmetries
• Kaluza-Klein Theories and the Anomalous Magnetic Moment of the Muon
• Pion and kaon role in $\tau$ decays, g_μ-2, the running of ${\alpha }_{QED}$ and the muonium hyperfine splitting
• Recent Muon g-2 Result in Deflected Anomaly-Mediated Supersymmetry Breaking
• Probing physics beyond the standard model from lepton sector
• Supersymmetry for Alp Hikers
• Resummation of Large Logarithms in ${\gamma }^{\ast }{\pi }^0\to \gamma$
• Supersymmetric Dark Matter
• Leptonic Probes of the Standard Model
• Can one measure C-odd asymmetry in e+e- --> pi+pi-
• Candidates for non-baryonic dark matter
• Muon g-2 and Implications for Supersymmetry
• Supersymmetric Model of Muon Anomalous Magnetic Moment and Neutrino Masses
• Decline and Fall of the Standard Model?
• Supersymmetry and Electroweak Leptonic Observables
• Tau data-driven evaluation of the Hadronic Vacuum Polarization
• Lepton Photon 2001 Concluding Remarks
• Verifiable Origin of Neutrino Mass at TeV Scale
• Radiative return at e+e- factories
• Tau Data-Based Evaluations of the hadronic vacuum polarization contribution to the muon $g-2$