Lepton flavor violation in SUSY left-right symmetric theories

TL;DR

This paper explores lepton flavor violation in SUSY left-right symmetric models, showing that observable LFV effects in right-handed sleptons can reveal physics near the GUT scale, unlike minimal models.

Contribution

It demonstrates that non-minimal SUSY left-right models predict significant LFV signals in right-handed sleptons, providing a new way to probe high-scale physics.

Findings

Observable LFV effects in right-handed sleptons.

LFV signals can probe physics near the GUT scale.

Contrasts with minimal models where LFV effects are negligible.

Abstract

The seesaw mechanism is the most popular explanation for the smallness of neutrino masses. However, its high scale makes direct tests impossible and only indirect signals at low energies are reachable for collider experiments. One of these indirect links with the high scale is lepton flavor violation (LFV). We discuss LFV decays of sleptons in the context of a SUSY left-right symmetric model that naturally incorporates the seesaw mechanism. This non-minimal embedding of the seesaw leads to observable LFV effects in the right-handed sleptons sector, contrary to minimal models where these are found to be totally negligible. Therefore, LFV observables can be used as a powerful tool to study physics right below the GUT scale.