# Probing the electromagnetic dipole moments of the tau-neutrino in the $U(1)_{B-L}$ model at the ILC and CLIC energies

## TL;DR

This paper investigates the potential to measure the electromagnetic dipole moments of the tau-neutrino at future linear colliders within a $U(1)_{B-L}$ model, providing significantly improved sensitivity limits over current bounds.

## Contribution

It introduces a novel analysis of tau-neutrino dipole moments at ILC and CLIC energies within a $U(1)_{B-L}$ framework, deriving much tighter experimental limits.

## Key findings

- Limits on tau-neutrino magnetic dipole moment improved by two orders of magnitude.
- Limits on tau-neutrino electric dipole moment improved by three orders of magnitude.
- Study demonstrates collider sensitivity to new physics in neutrino electromagnetic properties.

## Abstract

In this work we study the sensitivity on the anomalous magnetic and electric dipole moments of the tau-neutrino in the framework of the $SU(2)_L\times U(1)_Y\times U(1)_{B-L}$ electroweak model at future $e^+e^-$ linear colliders as the ILC and CLIC. For our study we consider the process $e^{+}e^{-}\rightarrow ( Z, Z', \gamma) \to \nu_\tau \bar \nu_\tau \gamma$. For center-of-mass energies of $\sqrt{s}=1000-3000\hspace{0.8mm}GeV$ and integrated luminosities of ${\cal L}=500-2000\hspace{0.8mm}fb^{-1}$, we derive $95 \% \hspace{1mm}$ C.L. limits on the dipole moments $|\mu_{\nu_\tau}(\mu_B)| \leq 6.28 \times 10^{-9}$ and $|d_{\nu_\tau}(e cm)| \leq 1.21 \times 10^{-21}$ improve the existing limits by two or three orders of magnitude. Our study complements other studies on the dipole moments of the tau-neutrino at hadron and $e^+e^-$ colliders.