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Neutrino Flavor Model Building and the Origins of Flavor and CP Violation: A Snowmass White Paper

https://doi.org/10.48550/arXiv.2204.08668

Almumin, Y. ; Chen, M.-C. ; Cheng, M. ; Knapp-Perez, V. ; Li, Y. ; Mondol, A. ; Ramos-Sanchez, S. ; Ratz, M. ; Shukla, S. ( April 2022 , Snowmass 2021 Community Summer Study)

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A note on the predictions of models with modular flavor symmetries

https://doi.org/j.physletb.2019.135153

Chen, M.-C. ; Ramos-Sánchez. S. ; Ratz, M. ( February 2020 , Physics letters)

Models with modular flavor symmetries have been thought to be highly predictive. We point out that these predictions are subject to corrections from non–holomorphic terms in the Lagrangean. Specifically, in the models discussed in the literature, the Kähler potential is not fixed by the symmetries, for instance. The most general Kähler potential consistent with the symmetries of the model contains additional terms with additional parameters, which reduce the predictive power of these constructions. We also comment on potential ways of how one may conceivably retain the predictivity.
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