Taming lepton portal dark matter by a non-invertible selection rule
- 1Kumamoto Health Science University
Abstract
We point out that a non-invertible selection rule can control the flavor violation inherent in lepton portal dark matter, a weakly interacting massive particle candidate that can evade severe constraints from direct detection experiments. We show that ordinary invertible symmetries cannot suppress flavor-violating portal couplings while accommodating the large mixing angles in the PMNS matrix. We then present a simple construction based on the ℤ2 gauging of a ℤ5 symmetry, which realizes one-flavor dominance of the portal couplings consistently with the PMNS mixing matrix. We also discuss possible flavor leakage in a type-I seesaw completion and study experimental probes of the model through lepton observables, especially lepton flavor non-universality in Z boson decays.
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BibTeX
@article{kawamura2026taming,
title = {{Taming lepton portal dark matter by a non-invertible selection rule}},
author = {Junichiro Kawamura},
journal = {Journal of High Energy Physics},
year = {2026},
month = nov,
doi = {10.1007/jhep11(2026)053},
url = {https://link.springer.com/article/10.1007/JHEP11(2026)053},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Taming lepton portal dark matter by a non-invertible selection rule
AU - Junichiro Kawamura
PY - 2026
DA - 2026/11/05
JO - Journal of High Energy Physics
DO - 10.1007/jhep11(2026)053
UR - https://link.springer.com/article/10.1007/JHEP11(2026)053
AB - We point out that a non-invertible selection rule can control the flavor violation inherent in lepton portal dark matter, a weakly interacting massive particle candidate that can evade severe constraints from direct detection experiments. We show that ordinary invertible symmetries cannot suppress flavor-violating portal couplings while accommodating the large mixing angles in the PMNS matrix. We then present a simple construction based on the ℤ2 gauging of a ℤ5 symmetry, which realizes one-flavor dominance of the portal couplings consistently with the PMNS mixing matrix. We also discuss possible flavor leakage in a type-I seesaw completion and study experimental probes of the model through lepton observables, especially lepton flavor non-universality in Z boson decays.
SN - 1029-8479
ER -