منابع مشابه
Lepton and Quark Mass Matrices
We propose a model that all quark and lepton mass matrices have the same zero texture. Namely their (1,1), (1,3) and (3,1) components are zeros. The mass matrices are classified into two types I and II. Type I is consistent with the experimental data in quark sector. For lepton sector, if seesaw mechanism is not used, Type II allows a large νμ-ντ mixing angle. However, severe compatibility with...
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If the standard model of quark interactions is supplemented by a discrete A4 symmetry (which may be relevant for the lepton sector), the spontaneous breaking of the electroweak gauge symmetry allows arbitrary quark masses, but all mixing angles are predicted to be zero. A pattern of the explicit breaking of A4 is proposed, which results in a realistic charged-current mixing matrix. In the stand...
متن کاملFlavor Democracy and Quark Mass Matrices *
Based on experimental mass hierarchy, a set of flavor–democratic (FD) quark mass matrices at low energies is discussed. The model predicts CP violation parameters J CP = (0.3 ± 0.2) 10 −4 and ε ′ /ε = (0.6 ± 0.5) 10 −3. However, this simple FD model also predicts a physical top quark mass not much higher than 100 GeV. As a next step, we assume that the Standard Model (SM) breaks down around som...
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A nearly historical account of quark mass matrix models is given, and the structure of quark mass matrices in the Standard Model is studied. For a minimal parameter basis suggested earlier, where Mu is diagonal and Md11, Md13, Md31 are zero, the dependence of mass matrices on the CP violating phase δ of VCKM is reported: all parameters are almost independent, except Md22 and Md23, and the equal...
متن کاملTriangular Textures for Quark Mass Matrices
The hierarchical quark masses and small mixing angles are shown to lead to a simple triangular form for the U and D-type quark mass matrices. In the basis where one of the matrices is diagonal, each matrix element of the other is, to a good approximation, the product of a quark mass and a CKM matrix element. The physical content of a general mass matrix can be easily deciphered in its triangula...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.58.096012