Lepton flavor violating Z-boson decays at GigaZ as a probe of supersymmetry

TL;DR

This paper explores how lepton flavor violating Z-boson decays at GigaZ can serve as a sensitive test for supersymmetry, even under current experimental constraints, by analyzing two supersymmetric models.

Contribution

It demonstrates that rare Z decays can be significantly enhanced in supersymmetric models, providing a potential method to probe supersymmetry at GigaZ.

Findings

Rare Z decays can reach GigaZ sensitivity despite existing constraints.

Supersymmetry effects can be detected through lepton flavor violating Z decays.

Analysis covers minimal R-parity violating and seesaw supersymmetric models.

Abstract

We briefly review the lepton flavor violating Z-decays at GigaZ as a probe of supersymmetry by focusing on $Z \to \ell_i \overline{\ell}_j$ in two representative supersymmetric models: the minimal supersymmetric model without R-parity and the supersymmetric seesaw model. We conclude that under the current experimental constraints from LEP and $\ell_i\to \ell_j \gamma$, these rare decays can still be enhanced to reach the sensitivity of the GigaZ. Therefore, supersymmetry can be probed via these decays at GigaZ.