Abstract
Exotic Higgs decays are promising channels to discover new physics in the near future. We present a simple model with a new light scalar that couples to the Standard Model through a charged lepton-flavor violating interaction. This can yield exciting new signatures, such as h → e+e+μ−μ−, that currently have no dedicated searches at the Large Hadron Collider. We discuss this model in detail, assess sensitivity from flavor constraints, explore current constraints from existing multi-lepton searches, and construct a new search strategy to optimally target these exotic, lepton-flavor violating Higgs decays.
Highlights
To yield the observed dark matter abundance through thermal freeze out
We present a simple model with a new light scalar that couples to the Standard Model through a charged lepton-flavor violating interaction
The discovery of lepton flavor violating couplings in the charged lepton sector would be a striking indication of physics beyond the Standard Model
Summary
We focus on the flavor-violating couplings of charged leptons to a gauge singlet scalar mediator, φ. This mediator may be real or complex. We discuss the lowenergy model and the electroweak gauge-invariant effective theory. Appendix A describes some simple uv completions
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