Hierarchical Radiative Quark Mass Matrices with an $U(1)_X$ Horizontal Symmetry Model

Details Hierarchical Radiative Quark Mass Matrices with an $U(1)_X$ Horizontal Symmetry Model Hierarchical Radiative Quark Mass Matrices with an $U(1)_X$ Horizontal Symmetry Model

2000-06-09

arxiv.org/abs/hep-ph/0006093v2

Rev.Mex.Fis. 48 (2002) 32-38

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 tables and 3 figures Some comments added to clarify as suggested to publish. Some typing mistakes corrected. Updat

Scientific paper

In a model with a gauge group $G_{SM}\otimes U(1)_X$, where $G_{SM} \equiv SU(3)_C \otimes SU(2)_L \otimes U(1)_Y$ is the standard model gauge group and $U(1)_X$ is a horizontal local gauge symmetry, we propose a radiative generation of the spectrum of quark masses and mixing angles. The assignment of horizontal charges is such that at tree level only the third family is massive. Using these tree level masses and introducing exotic scalars, the light families of quarks acquire hierarchical masses through radiative corrections. The rank three quark mass matrices obtained are written in terms of a minimal set of free parameters of the model, whose values are estimated performing a numerical fit. The resulting quark masses and CKM mixing angles turn out to be in good agreement with the experimental values.

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