Model-independent study for the tau-neutrino electromagnetic dipole moments in $e^{+}{e}^{-}\to {\nu }_{\tau }{\bar{\nu }}_{\tau }\gamma$ at the CLIC

Abstract

We conduce a study to probe the sensitivity of the process $e^{+}{e}^{-}\to (\gamma ,Z)\to {\nu }_{\tau }{\bar{\nu }}_{\tau }\gamma$ to the total cross section, the magnetic moment and the electric dipole moment of the tau-neutrino in a model-independent way. For this study, the beam polarization facility at the Compact Linear Collider (CLIC) along with the typical center-of-mass energies $\sqrt{s}=380-3000GeV$ and integrated luminosities $\mathcal{L}=10-3000f{b}^{-1}$ is considered. We estimate the sensitivity at the $95\%$ Confidence Level (C.L.) and systematic uncertainties ${\delta }_{sys}=0,5,10\%$ on the dipole moments of the tau-neutrino. It is shown that the process under consideration $e^{+}{e}^{-}\to (\gamma ,Z)\to {\nu }_{\tau }{\bar{\nu }}_{\tau }\gamma$ is a good prospect for study the dipole moments of the tau-neutrino at the CLIC. Also, our study illustrates the complementarity between CLIC and other $e^{+}{e}^{-}$ and $pp$ colliders in probing extensions of the Standard Model, and shows that the CLIC at high energy and high luminosity provides a powerful means to sensitivity estimates for the electromagnetic dipole moments of the tau-neutrino.

Comments: 24 pages, 11 figures and 6 tables. arXiv admin note: text overlap with arXiv:1807.00238