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Supersymmetric type-III seesaw mechanism: Lepton flavor violating decays and dark matter

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Supersymmetric type-III seesaw mechanism: Lepton flavor violating decays and dark matter

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dc.contributor.author	Esteves, J. N.
dc.contributor.author	Romao, J. C.
dc.contributor.author	Hirsch, Martin
dc.contributor.author	Staub, Florian
dc.contributor.author	Porod, Werner
dc.date.accessioned	2014-08-25T11:56:48Z
dc.date.available	2014-08-25T11:56:48Z
dc.date.issued	2011
dc.identifier.citation	Esteves, J. N. Romao, J. C. Hirsch, Martin Staub, Florian Porod, Werner 2011 Supersymmetric type-III seesaw mechanism: Lepton flavor violating decays and dark matter Physical Review D 83 1 013003
dc.identifier.uri	http://hdl.handle.net/10550/37396
dc.description.abstract	We study a supersymmetric version of the seesaw mechanism type III. The model consists of the minimal supersymmetric extension of the standard model particle content plus three copies of 24 superfields. The fermionic part of the SU(2) triplet contained in the 24 is responsible for the type-III seesaw, which is used to explain the observed neutrino masses and mixings. Complete copies of 24 are introduced to maintain gauge coupling unification. These additional states change the beta functions of the gauge couplings above the seesaw scale. Using minimal Supergravity boundary conditions, we calculate the resulting supersymmetric mass spectra at the electroweak scale using full 2-loop renormalization group equations. We show that the resulting spectrum can be quite different compared to the usual minimal Supergravity spectrum. We discuss how this might be used to obtain information on the seesaw scale from mass measurements. Constraints on the model space due to limits on lepton flavour violating decays are discussed. The main constraints come from the bounds on μ-> e gamma but there are also regions where the decay tau -> μgamma gives stronger constraints. We also calculate the regions allowed by the dark matter constraint. For the sake of completeness, we compare our results with those for the supersymmetric seesaw type II and, to some extent, with type I.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2011, vol. 83, num. 1, p. 013003
dc.subject	Física
dc.title	Supersymmetric type-III seesaw mechanism: Lepton flavor violating decays and dark matter
dc.type	journal article	es_ES
dc.date.updated	2014-08-25T11:56:48Z
dc.identifier.doi	10.1103/PhysRevD.83.013003
dc.identifier.idgrec	072025
dc.rights.accessRights	open access	es_ES