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Hello! In the attached plot, we have the Majorana mass as a function of the lightest neutrino for the normal (m1<m2<m3) and inverted (m3<m1<m2) hierarchy. Plugging in the values from the PMNS matrix in the formula for Majorana mass, I get something of the form: ##m_{\beta\beta} = 0.7m_1+0.25m_2+0.05m_3##. I am not sure I understand why do we have that downward branching for the normal hierarchy. Can someone explain it to me? Thank you!
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