Lepton-Flavor Violation at Future Lepton Colliders and the Atmospheric Neutrino Oscillation

TL;DR

This paper explores the potential to detect lepton-flavor violation at future lepton colliders, suggesting they could surpass current tau decay experiments in sensitivity within a supersymmetric framework explaining atmospheric neutrino oscillations.

Contribution

It demonstrates that future lepton colliders can more effectively probe LFV slepton production than tau -> mu gamma decay in a supersymmetric model with right-handed neutrinos.

Findings

Future colliders have higher sensitivity to LFV slepton production.

LFV signals could be detectable beyond tau -> mu gamma constraints.

Supersymmetric models with right-handed neutrinos explain atmospheric neutrino oscillations.

Abstract

It can be expected from the result for the atmospheric neutrino by the SUPERKAMIOKANDE and the CHOOZ result that the the lepton-flavor violating (LFV) interaction between the second and third generations exits at the high energy scale. This leads to a non-vanishing LFV left-handed slepton mass between the second and third generations, induced by the radiative correction, in the minimal supergravity scenario. In this article, assuming that the supersymmetric standard model with the right-handed neutrinos explains the atmospheric neutrino result, we show that the reach of the LFV slepton production in the future lepton colliders can be more significant than that of tau -> mu gamma.