Abstract
To improve the theoretical prediction of the anomalous dipole moments of the $\tau$-neutrino, we have carried out a study through the process $\gamma e^- \to \tau \bar\nu_\tau \nu_e$, which represents an excellent and useful option in determination of these anomalous parameters. To study the potential of the process $\gamma e^- \to \tau \bar\nu_\tau \nu_e$, we apply a future high-energy and high-luminosity linear electron-positron collider, such as the CLIC, with $\sqrt{s}=380, 1500, 3000\hspace{0.8mm}GeV$ and ${\cal L}=10, 50, 100, 200, 500, 1000, 1500, 2000, 3000\hspace{0.8mm}fb^{-1}$, and we consider systematic uncertainties of $\delta_{sys}=0, 5, 10\%$. With these elements, we present a comprehensive and detailed sensitivity study on the total cross-section of the process $\gamma e^- \to \tau \bar\nu_\tau \nu_e$, as well as on the dipole moments $\mu_{\nu_\tau}$ and $d_{\nu_\tau}$ at the $95\%$ C.L., showing the feasibility of such process at the CLIC at the $\gamma e^-$ mode with unpolarized and polarized electron beams.
Highlights
Investigations of the theory and phenomenology of neutrino electromagnetic properties continue to be a very active field of interests to both theoretical and experimental physicists
The signs of new physics can be analyzed by investigating the electromagnetic dipole moments of the tau-neutrino, such as its MM and Electric Dipole Moment (EDM)
Motivated by the extensive physical program of the Compact Linear Collider (CLIC), we conduce a comprehensive study to probe the sensitivity of the process e+e− → (γ, Z) → ντ ντ γ to the total cross section, the MM and the EDM of the tau-neutrino in a model-independent way
Summary
Investigations of the theory and phenomenology of neutrino electromagnetic properties continue to be a very active field of interests to both theoretical and experimental physicists. As a consequence, this leaves space for the study of new physics BSM. Motivated by the extensive physical program of the CLIC, we conduce a comprehensive study to probe the sensitivity of the process e+e− → (γ, Z) → ντ ντ γ to the total cross section, the MM and the EDM of the tau-neutrino in a model-independent way. Our study illustrates the complementarity between CLIC and other e+e− and pp colliders in probing extensions of the SM, 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.
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