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Froggatt-Nielsen-like mechanism in the framework of modular symmetry for neutrino mass, mixing, and leptogenesis

Gourab Pathak* and Mrinal Kumar Das†

  • *Contact author: gourabpathak7@gmail.com
  • †Contact author: mkdas@tezu.ernet.in
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Phys. Rev. D 113, 015015 – Published 14 January, 2026

DOI: https://doi.org/10.1103/585g-vv4y

Abstract

We study a neutrino mass model with Froggatt-Nielsen (FN) like modular symmetry. The FN mechanism requires an additional gauge symmetry, U(1)FN, which is spontaneously broken at high energies. But in this work, we do not need an extra symmetry as modular weights play the role of the FN charges of the additional U(1)FN symmetry. We have constructed a neutrino mass model using FN-like modular symmetry in the T′ group. This model can accommodate neutrino oscillation parameters and also address other phenomena beyond the Standard Model, such as neutrinoless double beta decay and the baryon asymmetry of the Universe.

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Phys. Rev. D 113, 015015– Published 14 January, 2026
  • Received 20 August 2025
  • Accepted 23 December 2025
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