Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal

We discuss a class of models of neutrino masses and mixings with inverse hierarchy based on a broken U(1)_F flavour symmetry with charge L_e-L_\mu-L_\tau. The symmetry breaking sector receives separate contributions from flavon vev breaking terms and from soft mass breaking in the right handed Major...

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Detalles Bibliográficos
Autores principales: Altarelli, Guido, Franceschini, Roberto
Lenguaje:eng
Publicado: 2005
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2006/03/047
http://cds.cern.ch/record/915728
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author Altarelli, Guido
Franceschini, Roberto
author_facet Altarelli, Guido
Franceschini, Roberto
author_sort Altarelli, Guido
collection CERN
description We discuss a class of models of neutrino masses and mixings with inverse hierarchy based on a broken U(1)_F flavour symmetry with charge L_e-L_\mu-L_\tau. The symmetry breaking sector receives separate contributions from flavon vev breaking terms and from soft mass breaking in the right handed Majorana sector. The model is able to reproduce in a natural way all observed features of the charged lepton mass spectrum and of neutrino masses and mixings (even with arbitrarily small \theta_{13}), with the exception of a moderate fine tuning which is needed to accomodate the observed small value of r = Delta m^2_{sol} / Delta m^2_{atm}.
id cern-915728
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
record_format invenio
spelling cern-9157282023-03-14T17:17:41Zdoi:10.1088/1126-6708/2006/03/047http://cds.cern.ch/record/915728engAltarelli, GuidoFranceschini, RobertoNeutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a ReappraisalParticle Physics - PhenomenologyWe discuss a class of models of neutrino masses and mixings with inverse hierarchy based on a broken U(1)_F flavour symmetry with charge L_e-L_\mu-L_\tau. The symmetry breaking sector receives separate contributions from flavon vev breaking terms and from soft mass breaking in the right handed Majorana sector. The model is able to reproduce in a natural way all observed features of the charged lepton mass spectrum and of neutrino masses and mixings (even with arbitrarily small \theta_{13}), with the exception of a moderate fine tuning which is needed to accomodate the observed small value of r = Delta m^2_{sol} / Delta m^2_{atm}.We discuss a class of models of neutrino masses and mixings with inverse hierarchy based on a broken U(1)_F flavour symmetry with charge L_e-L_\mu-L_\tau for lepton doublets and arbitrary right-handed charges. The symmetry breaking sector receives separate contributions from flavon vev breaking terms and from soft mass breaking in the right handed Majorana sector. The model is able to reproduce in a natural way all observed features of the charged lepton mass spectrum and of neutrino masses and mixings (even with arbitrarily small \theta_{13}), with the exception of a moderate fine tuning which is needed to accomodate the observed small value of r = Delta m^2_{sol} / Delta m^2_{atm}.hep-ph/0512202CERN-PH-TH-2005-250RM3-TH-05-13CERN-PH-TH-2005-250RM-3-TH-2005-13oai:cds.cern.ch:9157282005-12-15
spellingShingle Particle Physics - Phenomenology
Altarelli, Guido
Franceschini, Roberto
Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal
title Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal
title_full Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal
title_fullStr Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal
title_full_unstemmed Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal
title_short Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\mu}-L_{\tau}$: a Reappraisal
title_sort neutrino masses with inverse hierarchy from broken $l_{e}-l_{\mu}-l_{\tau}$: a reappraisal
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/2006/03/047
http://cds.cern.ch/record/915728
work_keys_str_mv AT altarelliguido neutrinomasseswithinversehierarchyfrombrokenlelmultauareappraisal
AT franceschiniroberto neutrinomasseswithinversehierarchyfrombrokenlelmultauareappraisal

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