Yukawa Textures, New Physics and Nondecoupling

Abstract

We point out that New Physics can play an important r\^ ole in rescuing some of the Yukawa texture zero ans\" atze which would otherwise be eliminated by the recent, more precise measurements of $V_{CKM}$. As an example, a detailed analysis of a four texture zero ansatz is presented, showing how the presence of an isosinglet vector-like quark which mixes with standard quarks, can render viable this Yukawa texture. The crucial point is the nondecoupling of the effects of the isosinglet quark, even for arbitrary large values of its mass.

13 pages, no figures

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Cited by in corpus (17)

• Tri-bimaximal Neutrino Mixing and Quark Masses from a Discrete Flavour Symmetry
• Flavor mixings and textures of the fermion mass matrices
• Nearest-Neighbour Interaction from an Abelian Symmetry and Deviations from Hermiticity
• Yukawa sector of Multi Higgs Doublet Models in the presence of Abelian symmetries
• Possible textures of the fermion mass matrices
• Quark mixing sum rules and the right unitarity triangle
• Non-Hermitian Perturbations to the Fritzsch Textures of Lepton and Quark Mass Matrices
• Implications of CP asymmetry parameter sin2beta on structural features of texture specific mass matrices
• Minimal Weak Basis Textures and Quark Mixing Data
• Reconstruction of Quark Mass Matrices with Weak Basis Texture Zeroes from Experimental Input
• Patterns in the Fermion Mixing Matrix, a bottom-up approach
• Quark Flavor Mixings from Hierarchical Mass Matrices
• Diagonal reflection symmetries, four-zero texture, and trimaximal mixing with predicted ${\theta }_{13}$ in an $A_4$ symmeric model
• Implications of ${\delta }_l^{CP}\sim 270^{\circ }$ and ${\theta }_{23}\gtrsim 45^{\circ }$ for texture specific lepton mass matrices and $0\nu \beta \beta$ decay
• Quark Mass Matrices, textures and CKM precision measurements
• Nondecoupling of Heavy Fermions and a Special Yukawa Texture
• Conditions of naturalness and fine-tunings for type-I seesaw mechanism with four-zero texture