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Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC

Neutrino masses may be generated by the VEV of an $SU(2)_L$ Higgs triplet. We assume that the doubly charged component of such a triplet has a mass in the range of several 100 GeV, such that it is accessible at LHC. Its decay into like-sign leptons provides a clean experimental signature, which allo...

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Detalles Bibliográficos
Autores principales: Garayoa, Julia, Schwetz, Thomas
Lenguaje:eng
Publicado: 2007
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2008/03/009
http://cds.cern.ch/record/1074500
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author Garayoa, Julia
Schwetz, Thomas
author_facet Garayoa, Julia
Schwetz, Thomas
author_sort Garayoa, Julia
collection CERN
description Neutrino masses may be generated by the VEV of an $SU(2)_L$ Higgs triplet. We assume that the doubly charged component of such a triplet has a mass in the range of several 100 GeV, such that it is accessible at LHC. Its decay into like-sign leptons provides a clean experimental signature, which allows for a direct test of the neutrino mass matrix. By exploring the branching ratios of this decay into leptons of various flavours, we show that within this model the type of the neutrino mass spectrum (normal, inverted or quasi-degenerate) might actually be resolved at the LHC. Furthermore, we show that within the Higgs triplet model for neutrino mass the decays of the doubly charged scalar into like-sign lepton pairs at the LHC provide a possibility to determine the Majorana CP phases of the lepton mixing matrix.
id cern-1074500
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
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spelling cern-10745002019-09-30T06:29:59Zdoi:10.1088/1126-6708/2008/03/009http://cds.cern.ch/record/1074500engGarayoa, JuliaSchwetz, ThomasNeutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHCParticle Physics - PhenomenologyNeutrino masses may be generated by the VEV of an $SU(2)_L$ Higgs triplet. We assume that the doubly charged component of such a triplet has a mass in the range of several 100 GeV, such that it is accessible at LHC. Its decay into like-sign leptons provides a clean experimental signature, which allows for a direct test of the neutrino mass matrix. By exploring the branching ratios of this decay into leptons of various flavours, we show that within this model the type of the neutrino mass spectrum (normal, inverted or quasi-degenerate) might actually be resolved at the LHC. Furthermore, we show that within the Higgs triplet model for neutrino mass the decays of the doubly charged scalar into like-sign lepton pairs at the LHC provide a possibility to determine the Majorana CP phases of the lepton mixing matrix.arXiv:0712.1453CERN-PH-TH-2007-255IFIC-07-75FTUV-07-1210oai:cds.cern.ch:10745002007-12-11
spellingShingle Particle Physics - Phenomenology
Garayoa, Julia
Schwetz, Thomas
Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
title Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
title_full Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
title_fullStr Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
title_full_unstemmed Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
title_short Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
title_sort neutrino mass hierarchy and majorana cp phases within the higgs triplet model at the lhc
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/2008/03/009
http://cds.cern.ch/record/1074500
work_keys_str_mv AT garayoajulia neutrinomasshierarchyandmajoranacpphaseswithinthehiggstripletmodelatthelhc
AT schwetzthomas neutrinomasshierarchyandmajoranacpphaseswithinthehiggstripletmodelatthelhc