Please use this identifier to cite or link to this item:
Title: Revisiting bimaximal neutrino mixing in a model with S-4 discretesymmetry
Authors: Altarelli, Guido
Feruglio, Ferruccio
Merlo, Luca
Keywords: quark-lepton complementarity
a(4) family symmetry
flavor symmetry
mass matrix
mns matrices
Issue Date: May-2009
Publisher: International School for Advanced Studies (SISSA)
Source: 36 (Source: SPIRES, Date 7.7.2010)
Abstract: In view of the fact that the data on neutrino mixing are stillcompatible with a situation where Bimaximal mixing is valid in firstapproximation and it is then corrected by terms of O(lambda(C)) (withlambda(C) being the Cabibbo angle), arising from the diagonalization ofthe charged lepton masses, such that delta sin(2)theta(12) similar tosin theta(13) similar to O(lambda(C)) while delta sin(2)theta(23)similar to O(lambda(2)(C)), we construct a model based on the discretegroup S 4 where those properties are naturally realized. The model issupersymmetric in 4-dimensions and the complete flavour group is S-4 xZ(4) x U(1)(FN), which also allows to reproduce the hierarchy of thecharged lepton spectrum. The only fine tuning needed in the model is toreproduce the small observed value of r = Delta m(sun)(2)/Deltam(atm)(2). Once the relevant parameters are set to accommodate r thenthe spectrum of light neutrinos shows a moderate normal hierarchy andis compatible, within large ambiguities, with the constraints fromleptogenesis as an explanation of the baryon asymmetry in the Universe.
Description: Citazioni 36 (Source: SPIRES, Date 7.7.2010)
ISSN: 1126-6708
DOI: 10.1088/1126-6708/2009/05/020
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

Files in This Item:
File Description SizeFormat Existing users please Login
0903.1940v2.pdf634.78 kBAdobe PDF    Request a copy
SFX Query Show full item record Recommend this item

Page view(s)

Last Week
Last month
checked on Sep 20, 2020

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.