Improved bounds on the dipole moments of the tau-neutrino at high-energy ${\gamma }^{\ast }{e}^{-}$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions: ILC and CLIC

A. Gutiérrez-Rodríguez, M. Koksal, A. A. Billur

In this work we study the potential of the processes $e^{+}{e}^{-}\to e^{+}{\gamma }^{\ast }{e}^{-}\to e^{+}\tau {\bar{\nu }}_{\tau }{\nu }_e$ and $e^{+}{e}^{-}\to e^{+}{\gamma }^{\ast }{\gamma }^{\ast }{e}^{-}\to e^{+}{\nu }_{\tau }{\bar{\nu }}_{\tau }{e}^{-}$ at a future high-energy and h…