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.

RELATIVISTIC MEAN FIELD THEORETICAL FOUNDATION OF THE DROPLET MODEL FOR NUCLEI

2002 ◽  
Vol 11 (01) ◽  
pp. 55-65 ◽  
Author(s):  
CHUN-YUAN GAO ◽  
QI-REN ZHANG
Keyword(s):  
Mass Formula ◽  
Energy Surface ◽  
Theoretical Foundation ◽  
Mean Field Theory ◽  
Mean Field ◽  
Binding Energies ◽  
Droplet Model ◽  
Relativistic Mean Field ◽  
Theoretical Foundations ◽  
Type Mass

The binding energies per-nucleon for 1654 nuclei, whose mass numbers range from 16 to 263 and charge numbers range from 8 to 106, are calculated by the relativistic mean field theory, with finite nucleon size effect being taken into account. The calculated energy surface goes through the middle of experimental points, and the root mean square deviation for the binding energies per-nucleon is 0.08163 MeV. The numerical results may be well simulated by a droplet model type mass formula. The droplet model is therefore put on the relativistic mean field theoretical foundations.

scholarly journals Minimal scoto-seesaw mechanism with spontaneous CP violation

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
D. M. Barreiros ◽  
F. R. Joaquim ◽  
R. Srivastava ◽  
J. W. F. Valle
Keyword(s):  
Dark Matter ◽  
Cp Violation ◽  
Vacuum Expectation ◽  
Vacuum Expectation Value ◽  
Discrete Symmetry ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Seesaw Mechanism ◽  
Cosmological Observations ◽  
Scalar Singlet

Abstract We propose simple scoto-seesaw models to account for dark matter and neutrino masses with spontaneous CP violation. This is achieved with a single horizontal $$ {\mathcal{Z}}_8 $$ Z 8 discrete symmetry, broken to a residual $$ {\mathcal{Z}}_2 $$ Z 2 subgroup responsible for stabilizing dark matter. CP is broken spontaneously via the complex vacuum expectation value of a scalar singlet, inducing leptonic CP-violating effects. We find that the imposed $$ {\mathcal{Z}}_8 $$ Z 8 symmetry pushes the values of the Dirac CP phase and the lightest neutrino mass to ranges already probed by ongoing experiments, so that normal-ordered neutrino masses can be cornered by cosmological observations and neutrinoless double beta decay experiments.

Fermion masses, flavour mixing and CP violation

2008 ◽  
Author(s):  
G. G. Ross ◽  
Pyungwon Ko ◽  
Deog Ki Hong
Keyword(s):  
Cp Violation ◽  
Fermion Masses

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.

scholarly journals On Consistency between Okubo-Type Mass Formula and Experimental Result of DORIS

1976 ◽  
Vol 56 (3) ◽  
pp. 994-995
Author(s):  
K. Honda ◽  
K. Iwata ◽  
T. Murota
Keyword(s):  
Mass Formula ◽  
Experimental Result ◽  
Type Mass

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
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