CP violations in predictive neutrino mass structures

We study the CP-violation effects from two types of neutrino mass matrices with (i) (M_ν)_ee = 0, and (ii) (M_ν)_ee = (M_ν)_eμ = 0, which can be realized by the high-dimensional lepton number violating operators anti l_R^cγ^μL_L(D_μΦ)Φ² and @ anti l_R^cl_R(D_μΦ)²Φ², respectively. In (i), the neutrino mass spectrum is in the normal ordering with the lightest neutrino mass within the range 0.002 eV 0 0, there are two solutions for the two Majorana phases α₂₁ and α₃₁, whereas the Dirac phase δ is arbitrary. For (ii), the parameters of m₀, δ, α₂₁, and α₃₁ can be completely determined. We calculate the CP-violating asymmetries in neutrino-antineutrino oscillations for both mass textures of (i) and (ii), which are closely related to the CP-violating Majorana phases. (orig.)