scholarly journals Charged-fermion masses in : Analysis with scalars in

2006 ◽  
Vol 754 (1-2) ◽  
pp. 1-16 ◽  
Author(s):  
Luís Lavoura ◽  
Helmut Kühböck ◽  
Walter Grimus
Keyword(s):  
Charged Fermion ◽  
Fermion Masses

scholarly journals CHARGE QUANTIZATION IN THE LARGEST LEPTOQUARK–BILEPTON CHIRAL ELECTROWEAK SCHEME

1999 ◽  
Vol 14 (17) ◽  
pp. 1133-1142 ◽  
Author(s):  
A. DOFF ◽  
F. PISANO
Keyword(s):  
Gauge Group ◽  
Electric Charge ◽  
Charged Fermion ◽  
Charge Quantization ◽  
Fermion Masses

The uniqueness of the hypercharge assignments in the three-fermion families leptoquark–bilepton SU (3)C× SU (4)L× U (1)N model is established. Although the gauge group contains an explicit U(1) factor, freedom from triangle anomalies combined with the requirement of nonvanishing charged fermion masses uniquely fix the electric charges of all fermions independently of the neutrinos being massless or not. The electric-charge quantization, flavor family replication, and the existence of three colors are interwoven.

scholarly journals Neutrino Masses and SO(10) SUSY GUTs

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 569-575
Author(s):  
Stuart Raby
Keyword(s):  
Solar Neutrino ◽  
Atmospheric Neutrino ◽  
Neutrino Masses ◽  
Family Symmetry ◽  
Mixing Angle ◽  
Mixing Angles ◽  
Charged Fermion ◽  
Fermion Masses ◽  
Global Fit ◽  
Precision Electroweak Data

In this talk I discuss the qualitative features of an SO(10) SUSY GUT with an SU (2)× U (1) n family symmetry. I then describe the global fit of this theory to precision electroweak data [including charged fermion masses and mixing angles]. Finally, the predictions of the model for neutrino masses and mixing are discussed. The most predictive version of the model naturally fits atmospheric neutrino data with maximal νμ→ντ oscillations and solar neutrino data with small mixing angle MSW νe→νsterile oscillations.

scholarly journals Data driven flavour model

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
F. Arias-Aragón ◽  
C. Bouthelier-Madre ◽  
J. M. Cano ◽  
L. Merlo
Keyword(s):  
Scalar Potential ◽  
Majorana Neutrino ◽  
Double Beta Decay ◽  
Fermion Mass ◽  
Type I ◽  
Minimal Flavour Violation ◽  
Seesaw Mechanism ◽  
Charged Fermion ◽  
Fermion Masses ◽  
Flavour Violation

AbstractA bottom-up approach has been adopted to identify a flavour model that agrees with present experimental measurements. The charged fermion mass hierarchies suggest that only the top Yukawa term should be present at the renormalisable level. Similarly, describing the lightness of the active neutrinos through the type-I Seesaw mechanism, right-handed neutrino mass terms should also be present at the renormalisable level. The flavour symmetry of the Lagrangian including the fermionic kinetic terms and only the top Yukawa is then a combination of U(2) and U(3) factors. Once considering the Majorana neutrino terms, the associated symmetry is O(3). Lighter charged fermion and active neutrino masses and quark and lepton mixings arise considering specific spurion fields à la Minimal Flavour Violation. The associated phenomenology is investigated and the model turns out to have almost the same flavour protection as the Minimal Flavour Violation in both quark and lepton sectors. Promoting the spurions to dynamical fields, the associated scalar potential is also studied and a minimum is identified such that fermion masses and mixings are correctly reproduced. Very precise predictions for the Majorana phases follow from the minimisation of the scalar potential and thus the neutrinoless-double-beta decay may represent a smoking gun for the model.

scholarly journals How neutrino and charged fermion masses are connected within minimal supersymmetric SO(10)

2001 ◽  
Author(s):  
Francesco Vissani ◽  
Borut Bajc ◽  
Goran Senjanovic
Keyword(s):  
Charged Fermion ◽  
Fermion Masses
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