title: Alternative Electroweak Symmetry Breaking based on Conformal Extensions of the Standard Model
creator: Humbert, Pascal
subject: ddc-530
subject: 530 Physics
description: In order to address the hierarchy problem and to simultaneously explain small  neutrino masses, we study conformal extensions of the Standard Model (SM),  which realize an inverse seesaw mechanism. Furthermore, we give a systematic  discussion of the neutrino mass matrix in a generalized type-I seesaw set-up.  We study the conformal inverse seesaw mechanism (CISS), in which the conformal  symmetry is spontaneously broken via the Coleman-Weinberg mechanism  at a few TeV. We confirm that in this set-up the electroweak vacuum expectation  value and the Higgs mass are obtained within experimental uncertainties. The  scalar sector in the broken phase contains, besides the Higgs, a massive scalar  with a mass in the TeV-range and the pseudo-Goldstone boson of broken scale  invariance with a mass of the order of hundreds of GeV. The CISS also features  a hidden Abelian gauge symmetry. We show that the CISS generates active  neutrino masses and mixings in agreement with oscillation data. Additionally,  the neutrino spectrum contains a warm dark matter (DM) candidate with mass  in the keV-range and tiny mixing of the order of 10
date: 2016
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/21652/1/Thesis_Pascal_Humbert.pdf
identifier: DOI:10.11588/heidok.00021652
identifier: urn:nbn:de:bsz:16-heidok-216527
identifier:   Humbert, Pascal  (2016) Alternative Electroweak Symmetry Breaking based on Conformal Extensions of the Standard Model.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/21652/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng