Quark-lepton complementarity revisited

Abstract

We reexamine the quark-lepton complementarity (QLC) in nine angle-phase parametrizations with the latest result of a large lepton mixing angle ${\vartheta }_{13}$ from the T2K, MINOS and Double Chooz experiments. We find that there are still two QLC relations satisfied in P1, P4 and P6 parametrizations, whereas only one QLC relation holds in P2, P3, P5 and P9 parametrizations separately. We also work out the corresponding reparametrization-invariant forms of the QLC relations and check the resulting expressions with the experimental data. The results can be viewed as a check of the validity of the QLC relations, as well as a new perspective into the issue of seeking for the connection between quarks and leptons.

5 Latex pages, 2 tables. Final version for publication in PRD

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• New mixing pattern for neutrinos
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• Non-maximal θ_{23}, large θ_{13} and tri-bimaximal θ_{12} via quark-lepton complementarity at next-to-leading order
• Simple parametrization of neutrino mixing matrix
• The hidden symmetries in the PMNS matrix and the light sterile neutrino(s)
• Implications of equalities among the elements of CKM and PMNS matrices