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arXiv · 2409.10912

Lepton seesaw model in a modular $A_4$ symmetry

Takaaki Nomura·Hiroshi Okada
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Abstract

We propose a lepton seesaw model to get the same mass-origin of charged-leptons and neutrinos introducing a modular $A_4$ symmetry. In this scenario, the mass matrix of charged-leptons is induced via seesaw-like mechanism while the mass matrix of neutrino is realized via an inverse seesaw mechanism with help of vector-like fermions and an isospin singlet and triplet scalar field with nonzero vacuum expectation values. In analyzing the model we concentrate on fixed points of modulus $\tau$ that is favored by a flux compactification of Type IIB string theory. We search for allowed region at nearby these fixed points and find good solutions at nearby $\tau=\omega$ with several good predictions.

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Takaaki Nomura, Hiroshi Okada. 2024-09-17. Lepton seesaw model in a modular $A_4$ symmetry. https://arxiv.org/abs/2409.10912

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