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arXiv · hep-ph/9507276

Decay of Z into Two Light Higgs Bosons

T. V. Duong·E. Keith·Hisashi Kikuchi·Ernest Ma
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Abstract

If the standard electroweak gauge model is extended to include two or more Higgs doublets, there may be a neutral Higgs boson $h$ which is light (with a mass of say 10 GeV) but the $hZZ$ coupling is suppressed so that it has so far escaped experimental detection. However, the effective $hhZZ$ coupling is generally unsuppressed, hence the decay of Z into two light Higgs bosons plus a fermion-antifermion pair may have an observable branching fraction, especially if $h$ decays invisibly as for example in the recently proposed doublet Majoron model.

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T. V. Duong, E. Keith, Hisashi Kikuchi, Ernest Ma. 1995-07-10. Decay of Z into Two Light Higgs Bosons. https://doi.org/10.1103/physrevd.52.5045

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