Probing the Seesaw and Gauge Mediation Scales with BR(μ\to eγ) and |U_{e3}|

Abstract

The new MEG bound on BR(μ\to eγ) provides the strongest upper bound on the scale of gauge mediation of supersymmetry breaking. If, in the future, this decay is observed by MEG, the mediation scale will become known to within one order of magnitude, and the seesaw scale will be constrained. In such a case, contributions from Planck mediated supersymmetry breaking are likely to be non-negligible, and an interpretation in terms of purely seesaw parameters will be impossible. The recent evidence for |U_{e3}|~0.15 further sharpens the predictions of gauge mediated supersymmetry breaking.

6 pages, 1 figure, v2: References added

References in corpus (5)

• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• General Gauge Mediation
• Flavour physics of leptons and dipole moments
• Flavor Changing Processes in Supersymmetric Models with Hybrid Gauge- and Gravity-Mediation
• Probing Supersymmetric Leptogenesis with mu --> e gamma

Cited by in corpus (1)

• Implications of Br(μ-> e γ) and Δa_mu on Muonic Lepton Flavor Violating Processes