Neutrino mass and invisible Higgs decays at the LHC

Abstract

The discovery of the Higgs boson suggests that also neutrinos get their mass from spontaneous symmetry breaking. In the simplest ungauged lepton number scheme, the Standard Model (SM) Higgs has now two other partners: a massive CP-even, as well as the massless Nambu-Goldstone boson, called majoron. For weak-scale breaking of lepton number the invisible decays of the CP- even Higgs bosons to the majoron lead to potentially copious sources of events with large missing energy. Using LHC results we study how the constraints on invisible decays of the Higgs boson restrict the relevant parameters, substantially extending those previously derived from LEP and shedding light on spontaneous lepton number violation.

arXiv comment12 pages, 8 figures; new section added, to appear in PRD

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• Bounds on Neutrino-Scalar Yukawa Coupling
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• Higgs precision study of the 750 GeV diphoton resonance and the 125 GeV standard model Higgs boson with Higgs-singlet mixing
• An $A_4$ realization of inverse seesaw: neutrino masses, ${\theta }_{13}$ and leptonic non-unitarity
• Gravitational footprints of massive neutrinos and lepton number breaking
• Scotogenic Dark Symmetry as a residual subgroup of Standard Model Symmetries
• Dark matter as the origin of neutrino mass in the inverse seesaw mechanism
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• Invisible Higgs Decay at the LHeC
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• Electroweak Breaking and Higgs Boson Profile in the Simplest Linear Seesaw Model
• Electroweak symmetry breaking in the inverse seesaw mechanism
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• Singlet Fermion Assisted Dominant Seesaw with Lepton Flavor and Number Violations and Leptogenesis
• Inverse seesaw mechanism with compact supersymmetry: enhanced naturalness and light super-partners