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arXiv · 1507.06779

Large invisible decay of a Higgs boson to neutrinos

Osamu Seto
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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.

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Osamu Seto. 2015-10-21. Large invisible decay of a Higgs boson to neutrinos. https://doi.org/10.1103/physrevd.92.073005

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