Using optimal observables in e+e- to tau+tau-, the authors project tau electric and weak dipole moment sensitivities down to 10^-21 e cm at the Z pole and tau anomalous magnetic moment sensitivity near 10^-5 at Belle-II.
Electromagnetic and Weak Moments of the Tau-Lepton
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abstract
The electromagnetic and weak dipole moments of the Tau-lepton have been measured by experiments at e+e- colliders. Data samples of e+e- --> tau+tau-, e+e- --> tau+tau- gamma and e+e- --> e+e-tau+tau- events collected at centre-of-mass energies between 10 and 200 GeV are used. No deviation from the Standard Model is found. Limits on the moments are summarised from the most recent results.
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Probing the electromagnetic dipole moment of the $\tau$ lepton in the $e^+e^- \to \gamma^*/Z \to \tau^+ \tau^-$ reaction
Using optimal observables in e+e- to tau+tau-, the authors project tau electric and weak dipole moment sensitivities down to 10^-21 e cm at the Z pole and tau anomalous magnetic moment sensitivity near 10^-5 at Belle-II.