https://doi.org/10.1140/epjc/s10052-025-14126-9
Regular Article - Theoretical Physics
Non-unitary limits on different textures for low-scale seesaw models
1
Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado Postal 14-740, 07000, Ciudad de México, Mexico
2
Area Académica de Matemáticas y Física, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Código Postal, 42184, Pachuca, Hidalgo, Mexico
3
Instituto de Física, Universidad Nacional Autónoma de México, AP 20-364, 01000, Ciudad de México, Mexico
Received:
15
November
2024
Accepted:
26
March
2025
Published online:
10
April
2025
New heavy neutral leptons lead to non-unitary effects in models for neutrino masses. Such effects could represent a sign of new physics beyond the Standard Model, leading to observable deviations in neutrino oscillation experiments, lepton flavor violation, and other precision measurements. This work explores the parameter space of the linear and inverse low-scale seesaw models based on flavor symmetries consistent with neutrino oscillation experiments. In particular, we investigated the violation of unitarity when the lepton flavor violation is absent and when only one lepton flavor-violating channel is present.
© The Author(s) 2025
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