Large invisible decay of a Higgs boson to neutrinos

Abstract

We show that the standard model (SM)-like Higgs boson may decay into neutrinos with a sizable decay branching ratio in one well-known two Higgs doublet model, so-called neutrinophilic Higgs model. This could happen if the mass of the lighter extra neutral Higgs boson is smaller than one half of the SM-like Higgs boson mass. The definite prediction of this scenario is that the rate of the SM-like Higgs boson decay into diphoton normalized by the SM value is about 0.9. In the case that a neutrino is Majorana particle, a displaced vertex of right-handed neutrino decay would be additionally observed. This example indicates that a large invisible Higgs boson decay could be irrelevant to dark matter.

13 pages, 4 figures, discussion added, the final journal version

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Cited by in corpus (8)

• Search for an invisibly decaying Higgs boson or dark matter candidates produced in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• On the Viability of Minimal Neutrinophilic Two-Higgs-Doublet Models
• Global $U(1{)}_L$ Breaking in Neutrinophilic 2HDM: From LHC Signatures to X-Ray Line
• Hunting for Heavy Majorana Neutrinos with Lepton Number Violating Signatures at LHC
• Invisible Higgs Decay at the LHeC
• Exploring collider aspects of a neutrinophilic Higgs doublet model in multilepton channels
• Cutoff of IceCube Neutrino Spectrum due to t-channel Resonant Absorption by C$\nu$B
• Explanation of IceCube spectrum with $\nu \to 3\nu$ neutrino splitting in a $\nu$2HDM model