A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions
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abstract
Taking the supersymmetric inverse seesaw mechanism as the explanation for neutrino oscillation data, we investigate charged lepton flavor violation in radiative and 3-body lepton decays as well as in neutrinoless $\mu-e$ conversion in muonic atoms. In contrast to former studies, we take into account all possible contributions: supersymmetric as well as non-supersymmetric. We take CMSSM-like boundary conditions for the soft supersymmetry breaking parameters. We find several regions where cancellations between various contributions exist, reducing the lepton flavor violating rates by an order of magnitude compared to the case where only the dominant contribution is taken into account. This is in particular important for the correct interpretation of existing data as well as for estimating the reach of near future experiments where the sensitivity will be improved by one to two orders of magnitude. Moreover, we demonstrate that ratios like BR($\tau\to 3 \mu$)/BR($\tau\to \mu e^+ e^-$) can be used to determine whether the supersymmetric contributions dominate over the $W^\pm$ and $H^\pm$ contributions or vice versa.
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A dark matter fermion is shown to simultaneously explain the relic density, satisfy direct detection and collider bounds, and produce observable rates for muon-to-electron transitions in a viable parameter region.
Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with data at 3 sigma.
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Revisiting cLFV in "T1-2-A" scotogenic models: asymmetries in three-body lepton decays
A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
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Dark Matter as a Source for Lepton Flavor Violation
A dark matter fermion is shown to simultaneously explain the relic density, satisfy direct detection and collider bounds, and produce observable rates for muon-to-electron transitions in a viable parameter region.
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Global analysis of a minimally extended scotogenic model
Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with data at 3 sigma.