منابع مشابه
Quark and lepton mass textures
We review ideas for explaining the pattern of fermion masses and mixing angles based on a spontaneously broken family symmetry. 1 The form of the quark mass matrices. The fundamental parameters of the Standard Model or its supersymmetric extension that are responsible for fermion masses and mixings are the Yukawa couplings or,equivalently, the fermion mass matrix. Unfortunately we do not have s...
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...
متن کاملPrecision Test of Quark Mass Textures: A Model Independent Approach
Using a Monte Carlo method, we have directly extracted from the available measurements, the hierarchies among the different elements of the quark mass matrices. To do that, we have first introduced a model independent parameterization for two generic class of models: those based on Abelian symmetries and those inspired by a U(2) horizontal symmetry. So, matrix entries are proportional to some ǫ...
متن کاملQuark mass textures within a finite non-Abelian dicyclic group.
Using as a flavor symmetry a finite nonabelian dicyclic Q2N group, we show how to derive quark mass matrices with two arrangements of symmetric texture zeros which are phenomenologically viable. Three other such acceptable textures in the recent literature are unattainable in this approach and hence disfavored. We assume massive vector-like fermions and Higgs singlets transforming as judiciousl...
متن کاملTextures for neutrino mass matrices.
We give a classification of heavy Majorana neutrino mass matrices with up to three texture zeroes, assuming the Dirac masses of the neutrinos to be of the same form as the ones of the up-quarks in the five texture zero solutions for the quark matrices. This is the case for many unified and partially unified models. We find that it is possible to have solutions which account for the solar and at...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2004
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.69.092002