E(6) model of light-fermion masses

1982 ◽  
Vol 25 (7) ◽  
pp. 1904-1909
Author(s):  
S. M. Barr
Keyword(s):  
Fermion Masses ◽  
Light Fermion

scholarly journals FLAVOR VIOLATION IN A MINIMAL SO(10)×A4 SUSY GUT

2012 ◽  
Vol 27 (01) ◽  
pp. 1250005 ◽  
Author(s):  
ABDELHAMID ALBAID
Keyword(s):  
Neutral Current ◽  
Branching Ratio ◽  
Flavor Violation ◽  
Flavor Changing ◽  
Fermion Masses ◽  
Fermion Fields ◽  
Experimental Constraint ◽  
Flavor Changing Neutral Current ◽  
High Degree ◽  
Light Fermion

Flavor violating processes in the quark and lepton sectors are investigated within a realistic supersymmetric SO(10)×A4 grand unification model. By employing exotic heavy fermion fields, this model successfully describes various features of the fermion masses and mixings including large neutrino mixings accompanied by small quark mixings. In this model the flavor violation is induced at GUT scale, at which A4 flavor symmetry is broken, as a consequence of the large mixings of the light fermion fields with these exotic heavy fields. The stringent experimental constraint from μ→eγ decay rate necessitates a high degree of degeneracy of the supersymmetry breaking soft scalar masses of the exotic heavy fields and supersymmetric scalar partners of the light fermion fields. The choice of slepton masses of order 1 TeV is found to be consistent with the constraints from branching ratio of μ→eγ and with all other flavor changing neutral current processes being sufficiently suppressed.

LIGHT FERMION MASSES FROM SU(3)color×U(1)e.m.?

1989 ◽  
Vol 04 (12) ◽  
pp. 1159-1167
Author(s):  
A. DAVIDSON ◽  
B. MARGOLIS ◽  
J. ROBINSON ◽  
P. VALIN
Keyword(s):  
Cp Violation ◽  
Mass Formula ◽  
First Generation ◽  
Complete Model ◽  
Seesaw Mechanism ◽  
Fermion Masses ◽  
Type Mass ◽  
Light Fermion

We consider the hypothesis that (i) mv≃0 because the neutrino is SU (3)c× U (1) e.m. neutral, (ii) m electron = 0 at the isospin limit where mu=md, and (iii) all first-generation fer-mions turn massless as αc, α e.m. →0. This hypothesis is supported by the empirical Abraham-Lorentz-type mass formula m=(ζ1Q+ζ2B)2, whose quadratic structure is attributed to a universal seesaw mechanism. We demonstrate how such a formula can stay exact even when switching on the inter-generational mixings. We present a complete model with the above features which gives quark and lepton masses and the K-M matrix, including CP violation.

scholarly journals Gauge U(1) dark symmetry and radiative light fermion masses

2016 ◽  
Vol 760 ◽  
pp. 59-62 ◽  
Author(s):  
Corey Kownacki ◽  
Ernest Ma
Keyword(s):  
Fermion Masses ◽  
Light Fermion

scholarly journals Radiative mechanism to light fermion masses in the MSSM

2008 ◽  
Vol 2008 (01) ◽  
pp. 072-072 ◽  
Author(s):  
C.M Maekawa ◽  
M.C Rodriguez
Keyword(s):  
Fermion Masses ◽  
Radiative Mechanism ◽  
Light Fermion
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