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Article overview
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New $U(1)'$ model with natural quark mass structure | | R. Martinez
; F. Ochoa
; J.P. Rubio
; | | Date: |
12 Mar 2013 | | Abstract: | We propose a new non-universal $U(1)’$ extension of the standard model with
the addition of three exotic quark singlets, two scalar singlets and one
additional scalar doublet. By introducing discrete symmetries and mixing
couplings between ordinary and exotic fermions, we obtain predictable mass
relations in the quark sector compatible with the phenomenological values
without large fine tuning of the Yukawa couplings and with few free parameters.
We obtain nontrivial constraints between Yukawa constants and mass parameters.
For example, the model exhibit a "natural" scenery (in the sense of symmetry)
where a large ratio between the top and charm quarks can be obtained by
providing Yukawa couplings with a nearly symmetric structure, consistent with a
flavor symmetry of the Yukawa couplings. | | Source: | arXiv, 1303.2734 | | Services: | Forum | Review | PDF | Favorites | |
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