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Littlest modular seesaw
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DOI：10.1007/JHEP02(2023)143.png)
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Abstract
En 中文
We present the first complete model of the Littlest Modular Seesaw, based on two right-handed neutrinos, within the framework of multiple modular symmetries, justifying the use of multiple moduli fields which take their values at 3 specific stabilizers of gamma(4)' (sic) S-4, including a new phenomenological possibility. Using a semi-analytical approach, we perform a chi(2) analysis of each case and show that good agreement with neutrino oscillation data is obtained, including predictive relations between the leptonic mixing angles and the ratio of light neutrino masses, which non-trivially agree with the experimental values. It is noteworthy that in this very predictive setup, the models fit the global fits of the experimental data remarkably well, both with and without the Sup er-Kamiokande atmospheric data, for both models presented here. By extending the model to include a weighton and the double cover group gamma(4)' (sic) S-4' , we are able to also account for the hierarchy of the charged leptons using modular symmetries, without altering the neutrino predictions.
Keywords:
Discrete Symmetries
Flavour Symmetries
Theories of Flavour
Journal
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5.5
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3.9W
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13.7W