2025/09/02 by Vien, V. V., Nguyen, T. Phong, Tham, T. D.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2509.02321
We construct a Standard Model (SM) extension with T^′× Z10 × Z2 symmetry for generating the expected neutrino mass matrix with the relation (Mν)13=(Mν)31=-(1)/(2)(Mν)22 via the contributions of the Type-I seesaw and Weinberg-type operators. The proposed model possesses viable parameters capable of predicting the neutrino oscillation parameters being in good agreement with recent constraints. Our analysis reveals the predicted regions for the physical quantities, given as follows. The two mass squared splittings are δm2∈ (69.360, 79.220) meV2 and Δm2∈ (2.484, 2.490)103 meV2 for normal ordering (NO) while δm2∈ (69.450, 79.160) meV2 and Δm2∈ (-2.464, -2.456)103 meV2 for inverted ordering (IO). The lightest neutrino mass is mℓ∈ (36.720, 36.780) meV for NO and mℓ∈ (62.220, 62.310) meV for IO. The sum of neutrino mass is ∑ mν∈ (136.700, 136.800) meV for NO and ∑ mν∈ (221.400, 221.600) meV for IO. Two Majorana phases are predicted to be α∈ (6.367, 6.380)^∘ and β∈ (6.936, 6.946)^∘ for NO while α≃ 358.800^∘ and β≃ 0.600^∘ for IO. Finally, the effective neutrino mass is mee∈ (36.940, 36.980) meV for NO and mee∈ (76.290, 76.360) meV for IO. Based on these results, the Yukawa-like couplings are estimated, which can naturally explain the charged - lepton as well as neutrino mass hierarchies.