Neutrinoless Double β⁺/EC Decays

Figure 3

Absolute value of the effective neutrino mass𝑚_eff=|⟨𝑚_𝜈⟩|against the mass𝑚₀of the lightest neutrino for both the normal and inverted mass hierarchy and for all possible values of the phases𝜑₁₂and𝜑₁₃defined in (15). The best-fit values [5] are used for the oscillation parameters (see (8)). The cosmological upper limit for𝑚₀, derived from the Planck satellite measurements [6], is also given.