scholarly journals Ameliorating the popular lepton mixings with A4 symmetry: A seesaw model for realistic neutrino masses and mixing

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Soumita Pramanick
Keyword(s):  
Neutrino Masses ◽  
Seesaw Model

scholarly journals Fermion mass and mixing in a low-scale seesaw model based on the S4 flavor symmetry

2019 ◽  
Vol 2019 (11) ◽  
Author(s):  
V V Vien ◽  
H N Long ◽  
A E Cárcamo Hernández
Keyword(s):  
Low Energy ◽  
Spontaneous Breaking ◽  
Fermion Mass ◽  
Recent Experimental Data ◽  
Neutrino Masses ◽  
Flavor Symmetry ◽  
Seesaw Model ◽  
Mixing Parameters ◽  
The Masses ◽  
Good Agreement

Abstract We construct a low-scale seesaw model to generate the masses of active neutrinos based on $S_4$ flavor symmetry supplemented by the $Z_2 \times Z_3 \times Z_4 \times Z_{14}\times U(1)_L$ group, capable of reproducing the low-energy Standard Model (SM) fermion flavor data. The masses of the SM fermions and the fermionic mixing parameters are generated from a Froggatt–Nielsen mechanism after spontaneous breaking of the $S_4\times Z_2 \times Z_3 \times Z_4 \times Z_{14}\times U(1)_L$ group. The obtained values for the physical observables of the quark and lepton sectors are in good agreement with the most recent experimental data. The leptonic Dirac CP-violating phase $\delta _\mathrm{CP}$ is predicted to be $259.579^\circ$ and the predictions for the absolute neutrino masses in the model can also saturate the recent constraints.

scholarly journals Compromise between neutrino masses and collider signatures in the type-II seesaw model

2008 ◽  
Vol 77 (1) ◽  
Author(s):  
Wei Chao ◽  
Shu Luo ◽  
Zhi-zhong Xing ◽  
Shun Zhou
Keyword(s):  
Neutrino Masses ◽  
Type Ii ◽  
Seesaw Model

scholarly journals Probing leptogenesis and pre-BBN universe with gravitational waves spectral shapes

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Rome Samanta ◽  
Satyabrata Datta
Keyword(s):  
Equation Of State ◽  
Gravitational Waves ◽  
Cosmic Strings ◽  
Gravitational Interaction ◽  
Big Bang ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Seesaw Model ◽  
String Loop ◽  
The Right

Abstract On the frequency-amplitude plane, Gravitational Waves (GWs) from cosmic strings show a flat plateau at higher frequencies due to the string loop dynamics in standard radiation dominated post-inflationary epoch. The spectrum may show an abrupt upward or a downward trend beyond a turning point frequency f*, if the primordial dark age prior to the Big Bang Nucleosynthesis (BBN), exhibits non-standard cosmic histories. We argue that such a spectral break followed by a rising GW amplitude which is a consequence of a post-inflationary equation of state (ω > 1/3) stiffer than the radiation (ω = 1/3), could also be a strong hint of a leptogenesis in the seesaw model of neutrino masses. Dynamical generation of the right handed (RH) neutrino masses by a gauged U(1) symmetry breaking leads to the formation of a network of cosmic strings which emits stochastic GWs. A gravitational interaction of the lepton current by an operator of the form ∂μRjμ — which can be generated in the seesaw model at the two-loop level through RH neutrino mediation, naturally seeks a stiffer equation of state to efficiently produce baryon asymmetry proportional to 1 − 3ω. We discuss how GWs with reasonably strong amplitudes complemented by a neutrino-less double beta decay signal could probe the onset of the most recent radiation domination and lightest RH neutrino mass at the intermediate scales.

scholarly journals Neutrino masses, leptogenesis, and dark matter in a hybrid seesaw model

2009 ◽  
Vol 79 (3) ◽  
Author(s):  
Pei-Hong Gu ◽  
M. Hirsch ◽  
Utpal Sarkar ◽  
J. W. F. Valle
Keyword(s):  
Dark Matter ◽  
Neutrino Masses ◽  
Seesaw Model

Neutrinos and cosmological matter–antimatter asymmetry: A minimal seesaw with Frampton–Glashow–Yanagida ansatz

2017 ◽  
Vol 32 (16) ◽  
pp. 1742004
Author(s):  
Jue Zhang ◽  
Shun Zhou
Keyword(s):  
Renormalization Group ◽  
Low Energy ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
High Energies ◽  
Seesaw Model ◽  
Mixing Parameters ◽  
Energy Neutrino ◽  
Flavor Mixing ◽  
Neutrino Experiments

In light of the latest neutrino data, we revisit a minimal seesaw model with the Frampton–Glashow–Yanagida ansatz. Renormalization-group running effects on neutrino masses and flavor mixing parameters are discussed and found to essentially have no impact on testing such a minimal scenario in low-energy neutrino experiments. However, since renormalization-group running can modify neutrino mixing parameters at high energies, it does affect the leptogenesis mechanism, which is responsible for the observed matter–antimatter asymmetry in our Universe. Furthermore, to ease the conflict between the naturalness argument and the successful leptogenesis, a special regime for resonant leptogenesis is also emphasized.

scholarly journals Supersymmetric seesaw model for the (1+3)-scheme of neutrino masses

2001 ◽  
Vol 497 (3-4) ◽  
pp. 259-264 ◽  
Author(s):  
F. Borzumati ◽  
K. Hamaguchi ◽  
T. Yanagida
Keyword(s):  
Neutrino Masses ◽  
Seesaw Model

scholarly journals A4-based seesaw model for realistic neutrino masses and mixing

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Soumita Pramanick ◽  
Amitava Raychaudhuri
Keyword(s):  
Neutrino Masses ◽  
Seesaw Model
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