The Nature of Massive Neutrinos

Figure 1

The effective Majorana mass |⟨𝑚⟩| (including a 2𝜎 uncertainty), as a function of min(𝑚_𝑗) for sin²𝜃₁₃=0.0236±0.0042 [27, 28] and 𝛿=0. The figure is obtained using also the best fit values and 1𝜎 errors of Δ𝑚²₂₁, sin²𝜃₁₂, and |Δ𝑚²₃₁₍₃₂₎| given in Table 1.7 in [11]. The phases 𝛼_21,31 are varied in the interval [0,𝜋]. The predictions for the NH, IH, and QD spectra are indicated. The red regions correspond to at least one of the phases 𝛼_21,31 and (𝛼₃₁−𝛼₂₁) having a CP violating value, while the blue and green areas correspond to 𝛼_21,31 possessing CP conserving values (from [11]).