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Theory of the tau lepton anomalous magnetic moment

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arxiv hep-ph/0701260 v1 pith:MLNZWGVW submitted 2007-01-30 hep-ph

Theory of the tau lepton anomalous magnetic moment

classification hep-ph
keywords leptonhadronicpredictionanomalousanomalyarticleavailablebabar
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This article reviews and updates the Standard Model prediction of the tau lepton g-2. Updated QED and electroweak contributions are presented, together with new values of the leading-order hadronic term, based on the recent low energy e+ e- data from BaBar, CMD-2, KLOE and SND, and of the hadronic light-by-light contribution. The total prediction is confronted to the available experimental bounds on the tau lepton anomaly, and prospects for its future measurements are briefly discussed.

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Forward citations

Cited by 9 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Differential measurements of $\gamma\gamma\to\tau\tau$ and constraints on $\tau$-lepton electromagnetic moments in Pb+Pb collisions at $\sqrt{s_{_\text{NN}}} = 5.02$ TeV with ATLAS

    nucl-ex 2026-05 unverdicted novelty 7.0

    First differential cross-sections for γγ→ττ in Pb+Pb collisions yield 95% CL intervals -0.057 < a_τ < 0.035 and |d_τ| < 2.7×10^{-16} e cm.

  2. Measurement of the $\gamma\gamma \to \tau \tau$ cross section and constraints on the anomalous magnetic moment of the $\tau$ lepton in ultraperipheral PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV

    nucl-ex 2026-07 conditional novelty 5.0

    CMS measures gamma-gamma -> tau+tau- in PbPb UPCs and constrains the tau anomalous magnetic moment to -0.039 < a_tau < 0.032 (95% CL), with a fiducial cross-section of 555+60-14 microbarns.

  3. Current and future constraints on heavy New Physics from $\tau$ weak dipole moments

    hep-ph 2026-06 unverdicted novelty 5.0

    Tau weak dipole moments already rank among the leading probes of tau dipole operators and will become dominant at FCC-ee and HL-LHC.

  4. Probing the imaginary parts and their $q^2$ dependences for the tau $g-2$ and EDM

    hep-ph 2026-05 unverdicted novelty 5.0

    Explores q² dependence and imaginary parts of tau g-2 and EDM in SMEFT and 2HDM, proposing methods to measure them at Belle II and STCF to improve a_τ bounds by over an order of magnitude.

  5. Four-fermion operators, $Z$-boson exchange, and $\tau$ lepton dipole moments

    hep-ph 2026-04 unverdicted novelty 5.0

    Z-boson exchange contributes ~3e-6 to the relevant asymmetries while four-fermion operators can reach ~1e-5 times Wilson coefficients, with loop insertions offering an additional path to a_tau without beam polarization.

  6. Probing $\tau$ lepton dipole moments at future Lepton Colliders

    hep-ph 2026-04 unverdicted novelty 5.0

    Future lepton colliders can improve existing constraints on the tau lepton's dipole moments by several orders of magnitude through complementary channels.

  7. Spin effects in the tau-lepton pair induced by anomalous magnetic and electric dipole moments

    hep-ph 2026-02 unverdicted novelty 4.0

    Anomalous dipole moments of the tau lepton produce measurable effects on tau polarization and spin correlations in gamma-gamma and quark-antiquark induced pair production.

  8. Probing electromagnetic moments of the tau lepton in PbPb collisions at the FCC-hh

    hep-ph 2026-01 unverdicted novelty 3.0

    Obtains 95% CL exclusion and 3σ/5σ sensitivity limits on a_τ and d_τ from PbPb collisions at FCC-hh with comparisons to other future colliders.

  9. Lepton anomalous magnetic moments: Theory

    hep-ph 2025-12 unverdicted novelty 2.0

    The paper provides an overview of theoretical calculations for lepton anomalous magnetic moments arising from quantum corrections in the Standard Model.