Search for the anomalous electromagnetic moments of the tau lepton through electron-photon scattering at the CLIC

Abstract

We have examined the anomalous electromagnetic moments of the tau lepton in the processes $e^{-}\gamma \to {\nu }_e\tau {\bar{\nu }}_{\tau }$ ($\gamma$ is the Compton backscattering photon) and $e^{-}{e}^{+}\to e^{-}{\gamma }^{\ast }{e}^{+}\to {\nu }_e\tau {\bar{\nu }}_{\tau }{e}^{+}$ (${\gamma }^{\ast }$ is the Weizsacker-Williams photon) with unpolarized and polarized electron beams at the CLIC. We have obtained 95$\%$ confidence level bounds on the anomalous magnetic and electric dipole moments for various values of the integrated luminosity and center-of-mass energy. Improved constraints of the anomalous magnetic and electric dipole moments have been obtained compared to the LEP sensitivity.

24 pages, 9 figures, published version

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• Anomalous magnetic and weak magnetic dipole moments of the $\tau$ lepton in the simplest little Higgs model
• The ${\mu }^{+}{\mu }^{-}$ collider to sensitivity estimates on the magnetic and electric dipole moments of the tau-lepton
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