scholarly journals Scotogenic cobimaximal Dirac neutrino mixing from $$\Delta (27)$$ and $$U(1)_\chi $$

2019 ◽  
Vol 79 (11) ◽  
Author(s):  
Ernest Ma
Keyword(s):  
Dark Matter ◽  
Lepton Number ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Dirac Neutrino

Abstract In the context of $$SU(3)_C \times SU(2)_L \times U(1)_Y \times U(1)_\chi $$SU(3)C×SU(2)L×U(1)Y×U(1)χ, where $$U(1)_\chi $$U(1)χ comes from $$SO(10) \rightarrow SU(5) \times U(1)_\chi $$SO(10)→SU(5)×U(1)χ, supplemented by the non-Abelian discrete $$\Delta (27)$$Δ(27) symmetry for three lepton families, Dirac neutrino masses and their mixing are radiatively generated through dark matter. The gauge $$U(1)_\chi $$U(1)χ symmetry is broken spontaneously. The discrete $$\Delta (27)$$Δ(27) symmetry is broken softly and spontaneously. Together, they result in two residual symmetries, a global $$U(1)_L$$U(1)L lepton number and a dark symmetry, which may be $$Z_2$$Z2, $$Z_3$$Z3, or $$U(1)_D$$U(1)D depending on what scalar breaks $$U(1)_\chi $$U(1)χ. Cobimaximal neutrino mixing, i.e. $$\theta _{13} \ne 0$$θ13≠0, $$\theta _{23} = \pi /4$$θ23=π/4, and $$\delta _{CP} = \pm \pi /2$$δCP=±π/2, may also be obtained.

scholarly journals Lepton number violating operators with standard model gauge fields: a survey of neutrino masses from 3-loops and their link to dark matter

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Michael Gustafsson ◽  
José Miguel No ◽  
Maximiliano A. Rivera
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Neutrino Mass ◽  
New Physics ◽  
Lepton Number ◽  
Gauge Fields ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Mass Generation ◽  
Lepton Number Violating

Abstract We investigate neutrino mass generation scenarios where the lepton number breaking new physics does not interact with Standard Model (SM) quarks and couples only to the SM right-handed charged lepton chirality. The lowest-order lepton number violating effective operator which describes this framework is a unique dimension nine operator involving SM gauge fields, $$ {\mathcal{O}}_9 $$ O 9 . We find that there are two possible classes of new physics scenarios giving rise to this $$ {\mathcal{O}}_9 $$ O 9 operator. In these scenarios neutrino masses are induced radiatively via dark matter interactions, linking the dark matter to a natural explanation for the smallness of neutrino masses compared to the electroweak scale. We discuss the phenomenology and existing constraints in the different neutrino mass models within each class. In particular, we analyze the important interplay between neutrino mixing and neutrinoless double β-decay in order to predict characteristic signatures and disfavour certain scenarios.

scholarly journals Baryogenesis and dark matter in U(1) extensions

2017 ◽  
Vol 32 (15) ◽  
pp. 1740005 ◽  
Author(s):  
Wan-Zhe Feng ◽  
Pran Nath
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Lepton Number ◽  
Current Data ◽  
Neutrino Masses ◽  
Neutrino Experiment ◽  
The Standard Model ◽  
Reactor Neutrino ◽  
The Universe ◽  
Neutrino Masses And Mixings

A brief review is given of some recent works where baryogenesis and dark matter have a common origin within the U(1) extensions of the Standard Model (SM) and of the minimal supersymmetric Standard Model (MSSM). The models considered generate the desired baryon asymmetry and the dark matter to baryon ratio. In one model, all of the fundamental interactions do not violate lepton number, and the total [Formula: see text] in the Universe vanishes. In addition, one may also generate a normal hierarchy of neutrino masses and mixings in conformity with the current data. Specifically, one can accommodate [Formula: see text] consistent with the data from Daya Bay reactor neutrino experiment.

scholarly journals Supernova bounds on keV-mass sterile neutrinos

2015 ◽  
Vol 30 (13) ◽  
pp. 1530033 ◽  
Author(s):  
Shun Zhou
Keyword(s):  
Dark Matter ◽  
Energy Loss ◽  
Cold Dark Matter ◽  
Sterile Neutrino ◽  
Small Scale ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Sterile Neutrinos ◽  
Mixing Angles ◽  
Standard Energy

Sterile neutrinos of keV masses are one of the most promising candidates for the warm dark matter, which could solve the small-scale problems encountered in the scenario of cold dark matter. We present a detailed study of the production of such sterile neutrinos in a supernova core, and derive stringent bounds on the active-sterile neutrino mixing angles and sterile neutrino masses based on the standard energy-loss argument.

scholarly journals AFFLECK–DINE LEPTOGENESIS IN THE RADIATIVE NEUTRINO MASS MODEL

2011 ◽  
Vol 26 (06) ◽  
pp. 995-1009 ◽  
Author(s):  
H. HIGASHI ◽  
T. ISHIMA ◽  
D. SUEMATSU
Keyword(s):  
Dark Matter ◽  
Neutrino Mass ◽  
Baryon Number ◽  
Lepton Number ◽  
Neutrino Masses ◽  
Alternative Possibility ◽  
Mass Model ◽  
Neutrino Mass Models ◽  
Baryon Number Asymmetry ◽  
The Universe

Radiative neutrino mass models have interesting features, which make it possible to relate neutrino masses to the existence of dark matter. However, the explanation of the baryon number asymmetry in the universe seems to be generally difficult as long as we suppose leptogenesis based on the decay of thermal right-handed neutrinos. Since right-handed neutrinos are assumed to have masses of O(1) TeV in these models, they are too small to generate the sufficient lepton number asymmetry. Here we consider Affleck–Dine leptogenesis in a radiative neutrino mass model by using a famous flat direction LHu as an alternative possibility. The constraint on the reheating temperature could be weaker than the ordinary models. The model explains all the origin of the neutrino masses, the dark matter, and also the baryon number asymmetry in the universe.

AN SU(2)L×U(1)L×U(1)R MODEL WITH FINITE DIRAC NEUTRINO MASSES

1993 ◽  
Vol 08 (10) ◽  
pp. 895-902 ◽  
Author(s):  
SUBHASH RAJPOOT
Keyword(s):  
Standard Model ◽  
Discrete Symmetry ◽  
Lepton Number ◽  
Tree Level ◽  
Neutrino Masses ◽  
Charged Scalar ◽  
Dirac Neutrino ◽  
Left Handed ◽  
The Standard Model ◽  
The One

An SU(2)L×U(1)L×U(1)R model of electroweak interactions is presented in which the conventional fermions of the standard model are left-handed doublets under SU(2)L× U(1)L and are right-handed singlets under U(1) R . The triangle anomalies are canceled by adding vector-like singlet fermions. Neutrinos are massless at the tree level due to a discrete symmetry and acquire tiny finite masses at the one-loop level due to the exchange of two charged scalar singlets. The singlet scalars carry two units of lepton number.

scholarly journals CUBIC MASS RELATION IN SU(3) × U(1) ELECTROWEAK THEORY

1994 ◽  
Vol 09 (08) ◽  
pp. 761-770 ◽  
Author(s):  
PAUL H. FRAMPTON ◽  
PLAMEN I. KRASTEV ◽  
JAMES T. LIU
Keyword(s):  
Dark Matter ◽  
Charged Lepton ◽  
Solar Neutrinos ◽  
Lepton Number ◽  
Neutrino Masses ◽  
Mass Relation ◽  
Electroweak Theory

In the 331 model, lepton number may be explicitly broken by trilinear scalar self couplings. This leads to neutrino masses proportional to the cube of the corresponding charged lepton mass, with consequences for solar neutrinos and for hot dark matter.

scholarly journals Bound-state dark matter and Dirac neutrino masses

2018 ◽  
Vol 97 (11) ◽  
Author(s):  
M. Reig ◽  
D. Restrepo ◽  
J. W. F. Valle ◽  
O. Zapata
Keyword(s):  
Dark Matter ◽  
Bound State ◽  
Neutrino Masses ◽  
Dirac Neutrino
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