scholarly journals NEW U(1) GAUGE SYMMETRY OF QUARKS AND LEPTONS

2002 ◽  
Vol 17 (09) ◽  
pp. 535-541 ◽  
Author(s):  
ERNEST MA
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Neutrino Mass ◽  
Majorana Neutrino ◽  
Particle Interactions ◽  
Remarkable Property ◽  
Seesaw Mechanism ◽  
Minimal Standard ◽  
Majorana Neutrino Mass

Instead of anchoring the seesaw mechanism with the conventional heavy right-handed neutrino singlet, a small Majorana neutrino mass may be obtained just as well with the addition of a heavy triplet of leptons per family to the minimal standard model of particle interactions. The resulting model is shown to have the remarkable property of accommodating a new U(1) symmetry which is anomaly-free and may thus be gauged. There are many possible phenomenological consequences of this proposal which may already be relevant in explaining one or two recent potential experimental discrepancies.

INVERSE SEESAW NEUTRINO MASS FROM LEPTON TRIPLETS IN THE U(1)Σ MODEL

2009 ◽  
Vol 24 (31) ◽  
pp. 2491-2495 ◽  
Author(s):  
ERNEST MA
Keyword(s):  
Standard Model ◽  
Neutrino Mass ◽  
Majorana Neutrino ◽  
Neutrino Masses ◽  
Particle Interactions ◽  
Seesaw Mechanism ◽  
Type Iii ◽  
The Standard Model

The inverse seesaw mechanism of neutrino mass, i.e. [Formula: see text], where ∊L is small, is discussed in the context of the U(1)Σ model. This is a gauge extension of the Standard Model of particle interactions with lepton triplets (Σ+, Σ0, Σ-) as (Type III) seesaw anchors for obtaining small Majorana neutrino masses.

scholarly journals Alternative renormalizable minimal SO(10) GUT and seesaw scale

2018 ◽  
Vol 33 (29) ◽  
pp. 1850167 ◽  
Author(s):  
Takeshi Fukuyama ◽  
Nobuchika Okada
Keyword(s):  
Neutrino Mass ◽  
Higgs Field ◽  
Majorana Neutrino ◽  
Fermion Mass ◽  
Seesaw Mechanism ◽  
Charged Fermion ◽  
Mass Matrices ◽  
The Right ◽  
Majorana Neutrino Mass ◽  
Higgs Fields

Alternative renormalizable minimal non-SUSY SO(10) GUT model is proposed. Instead of a 126-dimensional Higgs field, a 120-dimensional Higgs filed is introduced in addition to a 10-dimensional Higgs field and plays a crucial role to reproduce the realistic charged fermion mass matrices. With contributions of 120 Higgs field, the original Witten’s scenario of inducing the right-handed Majorana neutrino mass through 2-loop diagrams becomes phenomenologically viable. This model inherits the nice features of the conventional renormalizable minimal SO(10) GUT model with [Formula: see text] Higgs fields, while supplemented with a low scale seesaw mechanism due to the 2-loop induced right-handed Majorana neutrino mass.

scholarly journals Is left–right symmetry the key?

2017 ◽  
Vol 32 (04) ◽  
pp. 1730004 ◽  
Author(s):  
Goran Senjanović
Keyword(s):  
Standard Model ◽  
Predictive Model ◽  
Neutrino Mass ◽  
Majorana Neutrino ◽  
The Road ◽  
The Standard Model ◽  
Abdus Salam ◽  
Majorana Neutrino Mass ◽  
Complete Analogy

In collaboration with Jogesh Pati, Abdus Salam challenged the chiral gauge nature of the Standard Model by paving the road towards the left-right symmetric electro-weak theory. I describe here the logical and historical construction of this theory, by emphasising the pioneering and key role it played for neutrino mass. I show that it is a self-contained and predictive model with the Higgs origin of Majorana neutrino mass, in complete analogy with the SM situation regarding charged fermions.

scholarly journals Investigating the Hybrid Textures of Neutrino Mass Matrix for Near Maximal Atmospheric Neutrino Mixing

2018 ◽  
Vol 2018 ◽  
pp. 1-16
Author(s):  
Madan Singh
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Atmospheric Neutrino ◽  
Zero Element ◽  
Majorana Neutrino ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
The Comparative Study ◽  
Reactor Mixing ◽  
Majorana Neutrino Mass

We have studied that the implication of a large value of the effective Majorana neutrino mass in case of neutrino mass matrices has either two equal elements and one zero element (popularly known as hybrid texture) or two equal cofactors and one zero minor (popularly known as inverse hybrid texture) in the flavor basis. In each of these cases, four out of sixty phenomenologically possible patterns predict near maximal atmospheric neutrino mixing angle in the limit of large effective Majorana neutrino mass. This feature remains irrespective of the experimental data on solar and reactor mixing angles. In addition, we have also performed the comparative study of all the viable cases of hybrid and inverse hybrid textures at 3σ CL.

scholarly journals General parametrization of Majorana neutrino mass models

2020 ◽  
Vol 101 (7) ◽  
Author(s):  
I. Cordero-Carrión ◽  
M. Hirsch ◽  
A. Vicente
Keyword(s):  
Neutrino Mass ◽  
Majorana Neutrino ◽  
Neutrino Mass Models ◽  
Majorana Neutrino Mass
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