Impact of Future Lepton Flavor Violation Measurements in the Minimal Supersymmetric Standard Model

TL;DR

This paper evaluates how future measurements of lepton flavor violation could serve as powerful probes for supersymmetry in the minimal supersymmetric standard model, especially when quark and lepton flavor violations are comparable.

Contribution

It compares current and future bounds on lepton flavor violation with quark flavor constraints within the MSSM, highlighting scenarios where lepton measurements are most sensitive.

Findings

Lepton flavor violation can outperform quark constraints in certain parameter regions.

Future experiments may discover supersymmetry through lepton flavor violation signals.

Current quark flavor constraints are often stronger than upcoming lepton bounds.

Abstract

Working within the context of the minimal supersymmetric standard model, we compare current bounds from quark flavor changing processes with current and upcoming bounds on lepton flavor violation. We assume supersymmetry breaking approximately respects CP invariance. Under the further assumption that flavor violating insertions in the quark and lepton scalar masses are comparable, we explore when lepton flavor violation provides the strongest probe of new physics. We quote results both for spectra with all superpartners near the TeV scale and where scalars are multi-TeV. Constraints from quark flavor changing neutral currents are in many cases already stronger than those expected from future lepton flavor violation bounds, but large regions of parameter space remain where the latter could provide a discovery mode for supersymmetry.