On quark-lepton complementarity

Abstract

Recent measurements of the neutrino solar mixing angle and the Cabibbo angle satisfy the empirical relation theta_{sol} + theta_{C} ~ 45^{o}. This relation suggests the existence of a correlation between the mixing matrices of leptons and quarks, the so called quark-lepton complementarity. Here, we examine the possibility that this correlation originates in the strong hierarchy in the mass spectra of quarks and charged leptons, and the seesaw mechanism that gives mass to the Majorana neutrinos. In a unified treatment of quarks and leptons in which the mass matrices of all fermions have a similar Fritzsch texture, we calculate the mixing matrices V_{CKM} and U_{MNSP} as functions of quark and lepton masses and only two free parameters, in very good agreement with the latest experimental values on masses and mixings. Three essential ingredients to explain the quark-lepton complementarity relation are identified: the strong hierarchy in the mass spectra of quarks and charged leptons, the normal seesaw mechanism and the assumption of maximal CP violation in the lepton sector.

6 pages, to appear in "Particles and fields: Xth Mexican Workshop on Particles and Fields" (Morelia, Mich. Mexico, November 6-12, 2005), Eds. A. Bashir and L. Villasenor, AIP Conference proceedings (2006)

References in corpus (5)

• Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity
• Mass and Flavor Mixing Schemes of Quarks and Leptons
• Neutrino Mixing and Quark-Lepton Complementarity
• Relation between the neutrino and quark mixing angles and grand unification
• Possible Gauge Theoretic Origin for Quark-Lepton Complementarity

Cited by in corpus (9)

• Quark lepton complementarity and renormalization group effects
• Neutrino masses and tribimaximal mixing in the minimal renormalizable supersymmetric SU(5) grand unified model with A4 flavor symmetry
• Quark-lepton complementarity and tribimaximal neutrino mixing from discrete symmetry
• Low and High Energy Phenomenology of Quark-Lepton Complementarity Scenarios
• Universal Mass Texture, CP violation and Quark-Lepton Complementarity
• Dependence of the Quark-Lepton Complementarity on Parametrizations of the CKM and PMNS Matrices
• Lepton mixing from the hidden sector
• Leptons and Quarks from a Discrete Flavor Symmetry
• Fermion masses and neutrino mixing in an U(1)_H flavor symmetry model with hierarchical radiative generation for light charged fermion masses