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Running of Low-Energy Neutrino Masses, Mixing Angles and CP Violation

John Ellis·Andi Hektor·Mario Kadastik·Kristjan Kannike·Martti Raidal
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Abstract

We calculate the running of low-energy neutrino parameters from the bottom up, parameterizing the unknown seesaw parameters in terms of the dominance matrix $R$. We find significant running only if the $R$ matrix is non-trivial and the light-neutrino masses are moderately degenerate. If the light-neutrino masses are very hierarchical, the quark-lepton complementarity relation $θ_c + θ_{12} = π/4$ is quite stable, but $θ_{13,23}$ may run beyond their likely future experimental errors. The running of the oscillation phase $δ$ is enhanced by the smallness of $θ_{13}$, and jumps in the mixing angles occur in cases where the light-neutrino mass eigenstates cross.

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John Ellis, Andi Hektor, Mario Kadastik, Kristjan Kannike, Martti Raidal. 2005-06-13. Running of Low-Energy Neutrino Masses, Mixing Angles and CP Violation. https://doi.org/10.1016/j.physletb.2005.09.056

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