Systematic parameter space search of extended quark-lepton complementarity

We systematically investigate the parameter space of neutrino and charged lepton mass matrices for textures motivated by an extended quark-lepton complementarity. As the basic hypothesis, we postulate that all mixing angles in Uℓ and Uν be either maximal or described by powers of a single small quantity ϵ≃θC. All mass hierarchies are described by this ϵ as well. In this study, we do not assume specific forms for Uℓ and Uν, such as large mixing coming from the neutrino sector only. We perform a systematic scan of the 262144 generated mixing matrices for being compatible with current experimental data, and find a sample of 2468 possibilities. We then analyze and classify the effective charged lepton and neutrino mass textures, where we especially focus on a subset of models getting under pressure for small θ13. In addition, we predict the mixing angle distributions from our sample of all valid textures, and study the robustness of this prediction. We also demonstrate how our procedure can be extended to predictions of the Dirac and Majorana phases in UPMNS. For instance, we find that CP conservation in neutrino oscillations is preferred, and we can impose a lower bound on the mixing matrix element for 0νββ decay.