scholarly journals Five texture zeros for Dirac neutrino mass matrices

2020 ◽  
Vol 47 (11) ◽  
pp. 115002
Author(s):  
Richard H. Benavides ◽  
Yithsbey Giraldo ◽  
Luis Muñoz ◽  
William A Ponce ◽  
Eduardo Rojas
Keyword(s):  
Neutrino Mass ◽  
Dirac Neutrino ◽  
Mass Matrices

scholarly journals BIMAXIMAL MIXINGS FROM THE TEXTURE OF THE RIGHT-HANDED MAJORANA NEUTRINO MASS MATRIX

2002 ◽  
Vol 17 (25) ◽  
pp. 3629-3640 ◽  
Author(s):  
N. NIMAI SINGH ◽  
MAHADEV PATGIRI
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Atmospheric Neutrino ◽  
Majorana Neutrino ◽  
Neutrino Mass Matrix ◽  
Diagonal Form ◽  
Dirac Neutrino ◽  
Mass Matrices ◽  
The Right ◽  
Majorana Neutrino Mass

We study the origin of neutrino masses and mixing angles which can accommodate the LMA MSW solutions of the solar neutrino anomaly as well as the solution of the atmospheric neutrino problem, within the framework of the see-saw mechanism. We employ the diagonal form of the Dirac neutrino mass matrices with the physical masses as diagonal elements in the hierarchical order. Such a choice has been motivated from the fact that the known CKM angles for the quark sector, are relatively small. We consider both possibilities where the Dirac neutrino mass matrix is either the charged lepton or the up-quark mass matrix within the framework of SO(10) GUT with or without supersymmetry. The nonzero texture of the right-handed Majorana neutrino mass matrix M R is used for the generation of the desired bimaximal mixings in a model independent way. Both hierarchical and inverted hierarchical models of the left-handed Majorana neutrino mass matrices are generated and then discussed with examples. The see-saw mass scale which is kept as a free parameter, is predicted in all the examples.

Evading the Dirac-neutrino-mass constraint from SN 1987A

1992 ◽  
Vol 45 (10) ◽  
pp. R3312-R3315 ◽  
Author(s):  
K. S. Babu ◽  
Rabindra N. Mohapatra ◽  
I. Z. Rothstein
Keyword(s):  
Neutrino Mass ◽  
Dirac Neutrino ◽  
Sn 1987A ◽  
Mass Constraint

scholarly journals Phenomenological implications of a class of neutrino mass matrices

2007 ◽  
Vol 784 (1-2) ◽  
pp. 103-117 ◽  
Author(s):  
S. Dev ◽  
Sanjeev Kumar ◽  
Surender Verma ◽  
Shivani Gupta
Keyword(s):  
Neutrino Mass ◽  
Mass Matrices

scholarly journals Phenomenology of two-texture zero neutrino mass matrices

2007 ◽  
Vol 76 (1) ◽  
Author(s):  
S. Dev ◽  
Sanjeev Kumar ◽  
Surender Verma ◽  
Shivani Gupta
Keyword(s):  
Neutrino Mass ◽  
Mass Matrices ◽  
Texture Zero

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.

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