Predictions from scoto-seesaw with A4 modular symmetry.

This paper's novelty lies in introducing a hybrid scoto-seesaw model rooted in A 4 discrete modular symmetry leading to several interesting phenomenological implications. The scoto-seesaw framework leads to generation of one mass square difference (Δ m atm 2) using the type-I seesaw mechanism at the tree level. Additionally, the scotogenic contribution is vital in obtaining the other mass square difference (Δ m sol 2) at the loop level, thus providing a clear interpretation of the two different mass square differences. The non-trivial transformation of Yukawa couplings under the A 4 modular symmetry helps to explore neutrino phenomenology with a specific flavor structure of the mass matrix. In addition to predictions for neutrino mass ordering, mixing angles and CP phases, this setup leads to precise predictions for ∑ m i as well as | m e e |. In particular, the model predicts ∑ m i ∈ (0.073 , 0.097) eV and | m e e | ∈ (3.15 , 6.66) × 10 − 3 eV range; within reach of upcoming experiments. Furthermore, our model is also promising for addressing lepton flavor violations, i.e., ℓ α → ℓ β γ , ℓ α → 3 ℓ β and μ − e conversion rates while staying within the realm of current experimental limits. [ABSTRACT FROM AUTHOR]