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

TL;DR

This study investigates the potential to detect anomalous electromagnetic moments of the tau lepton at the CLIC collider through specific electron-photon scattering processes, providing improved bounds over previous experiments.

Contribution

It presents new sensitivity estimates for tau lepton electromagnetic moments at CLIC, considering different beam polarizations and energies, enhancing previous bounds from LEP.

Findings

95% confidence level bounds on tau anomalous moments obtained

Improved constraints over LEP sensitivity

Analysis includes unpolarized and polarized electron beams

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 $e^{-}e^{+} \to e^{-}\gamma^* e^{+} \to \nu_{e}\tau \bar{\nu}_\tau e^+$ ($\gamma^*$ 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.