Electroweak breaking and neutrino mass: ‘invisible’ Higgs decays at the LHC (type II seesaw)

Bonilla, Cesar (AHEP Group, Instituto de Física Corpuscular — C.S.I.C./Universitat de València Edificio de Institutos de Paterna, C/Catedratico José Beltrán, 2 E-46980 Paterna (València) - Spain) ; Romão, Jorge C (Departamento de Física and CFTP, Instituto Superior Técnico Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal) ; Valle, José W F  (AHEP Group, Instituto de Física Corpuscular — C.S.I.C./Universitat de València Edificio de Institutos de Paterna, C/Catedratico José Beltrán, 2 E-46980 Paterna (València) - Spain)

15 June 2016

Abstract: Neutrino mass generation through the Higgs mechanism not only suggests the need to reconsider the physics of electroweak symmetry breaking from a new perspective, but also provides a new theoretically consistent and experimentally viable paradigm. We illustrate this by describing the main features of the electroweak symmetry breaking sector of the simplest type-II seesaw model with spontaneous breaking of lepton number. After reviewing the relevant ‘theoretical’ and astrophysical restrictions on the Higgs sector, we perform an analysis of the sensitivities of Higgs Boson searches at the ongoing ATLAS and CMS experiments at the LHC, including not only the new contributions to the decay channels present in the standard model (SM) but also genuinely non-SM Higgs Boson decays, such as ‘invisible’ Higgs Boson decays to majorons. We find sensitivities that are likely to be reached at the upcoming run of the experiments.


Published in: New J. Phys. 18 (2016) 033033
Published by: Institute of Physics Publishing/Deutsche Physikalische Gesellschaft
DOI: 10.1088/1367-2630/18/3/033033
arXiv: 1511.07351
License: CC-BY-3.0



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