scholarly journals Supersymmetric model with Dirac neutrino masses

2010 ◽  
Vol 81 (5) ◽  
Author(s):  
Gardner Marshall ◽  
Mathew McCaskey ◽  
Marc Sher
Keyword(s):  
Supersymmetric Model ◽  
Neutrino Masses ◽  
Dirac Neutrino

scholarly journals Naturally small Dirac neutrino masses in supergravity

2005 ◽  
Vol 71 (3) ◽  
Author(s):  
Steven Abel ◽  
Athanasios Dedes ◽  
Kyriakos Tamvakis
Keyword(s):  
Neutrino Masses ◽  
Dirac Neutrino

scholarly journals The $$B-L$$ B - L scotogenic models for Dirac neutrino masses

2017 ◽  
Vol 77 (12) ◽  
Author(s):  
Weijian Wang ◽  
Ruihong Wang ◽  
Zhi-Long Han ◽  
Jin-Zhong Han
Keyword(s):  
Neutrino Masses ◽  
Dirac Neutrino

NEUTRINO MASSES WITH DYNAMICAL ELECTROWEAK SYMMETRY BREAKING

2003 ◽  
Vol 18 (22) ◽  
pp. 3935-3946 ◽  
Author(s):  
THOMAS APPELQUIST
Keyword(s):  
Standard Model ◽  
Symmetry Breaking ◽  
Neutrino Mass ◽  
Electroweak Symmetry Breaking ◽  
Light Neutrino ◽  
Neutrino Masses ◽  
Electroweak Symmetry ◽  
Explicit Model ◽  
Dirac Neutrino ◽  
Mass Terms

In this talk I discuss the problem of accounting for light neutrino masses in theories with dynamical electroweak symmetry breaking. I will first describe this problem generally in a class of extended technicolor (ETC) models, describing the full set of Dirac and Majorana masses that arise in such theories. I will then present an explicit model exhibiting a combination of suppressed Dirac masses and a seesaw involving dynamically generated condensates of standard-model singlet, ETC-nonsinglet fermions. Because of the suppression of the Dirac neutrino mass terms, a seesaw yielding realistic neutrino masses does not require superheavy Majorana masses; indeed, the Majorana masses are typically much smaller than the largest ETC scale.

scholarly journals NEUTRINO PHYSICS WITH SMALL EXTRA DIMENSIONS

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 704-708 ◽  
Author(s):  
MATTHIAS NEUBERT
Keyword(s):  
Neutrino Physics ◽  
Gravity Model ◽  
Extra Dimensions ◽  
Zero Mode ◽  
Neutrino Masses ◽  
Mixing Angles ◽  
Dirac Neutrino ◽  
The Right ◽  
Fermion Zero Mode

We study neutrino physics in the context of the localized gravity model with non-factorizable metric proposed by Randall and Sundrum. Identifying the right-handed neutrino with a bulk fermion zero mode, which can be localized on the "hidden" 3-brane in the Randall-Sundrum model, we obtain naturally small Dirac neutrino masses with-out invoking a see-saw mechanism. Our model predicts a strong hierarchy of neutrino masses and generically large mixing angles.

scholarly journals Warped leptogenesis with Dirac neutrino masses

2007 ◽  
Vol 76 (2) ◽  
Author(s):  
Tony Gherghetta ◽  
Kenji Kadota ◽  
Masahide Yamaguchi
Keyword(s):  
Neutrino Masses ◽  
Dirac Neutrino

scholarly journals Super-Kamiokande neutrino oscillations and the supersymmetric model

2020 ◽  
Vol 9 ◽  
pp. 14
Author(s):  
A. Faessler
Keyword(s):  
Beta Decay ◽  
Neutrino Mass ◽  
Mass Matrix ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Electron Neutrino ◽  
Tree Level ◽  
Supersymmetric Model ◽  
Neutrino Masses ◽  
Muon Neutrinos

The standard model predicts a ratio of 2 for the number of atmospheric muon to electron neutrinos, while super-Kamiokande and others measure a much smaller value (1.30±0.02 for super-Kamiokande). Super-Kamiokande is also able to measure roughly the direction and the energy of the neutrinos. The zenith-angle dependence for the muon neutrinos suggests that the muon neutrinos oscillate into a third neutrino species, either into the r neutrino or a sterile neutrino. This finding is inves- tigated within the supersymmetric model. The neutrinos mix with the neutralinos, this meaning the wino, the bino and the two higgsinos. The 7 x 7 mass matrix is calculated on the tree level. One finds that the mass matrix has three linearly dependent rows, which means that two masses are zero. They are identified with the two lightest neutrino masses. The fit of the super-Kamiokande data to oscillations between three neutrinos yields, together with the result of supersymmetry, that the third neutrino mass lies between 2x10^-2 and 10^-1 eV. The two lightest neutrino masses are in supersymmetry on the tree level zero. The averaged electron neutrino mass which is the essential parameter in the neutrinoless double-beta decay is given by {m_ve) ~ m_v3 P_ze < 0.8 x10^-2 eV (95% confidence limit). It is derived from the super-Kamiokande data in this supersymmetric model to be two orders smaller than the best value (1 eV) from the neutrinoless double-beta decay.

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