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

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.

34 pages, 14 figures. V2: version published in PRD, includes discussion and constraints from future Mu3E experiment

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• Complementary Signals of Lepton Flavor Violation at a High-Energy Muon Collider
• Lepton flavour violation in the MSSM: exact diagonalization vs mass expansion
• The Muon Smasher's Guide
• Muon conversion to electron in nuclei in Minimal R-symmetric Supersymmetric Standard Model
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• Spontaneous CP Violation and Horizontal Symmetry in the MSSM: Toward Lepton Flavor Naturalness