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In the Majoron models the $SU(2)$ doublet Higgs can decay invisibly into aMajoron pair via its mixing with a singlet. An analysis of the LEP data showsthe invisible decay mode to be more visible than the SM decay. For thesemodels, the dominantly doublet Higgs $H$ is shown to have a mass limit within$\pm 6$ GeV of the SM limit irrespective of the model parameters. But thedominantly singlet one $S$ can be arbitrarily light for sufficiently smallmixing angle.Comment: (LATEX, 12 pages, 3 figures available on request), TIFR/TH/93-2

Mass limits of invisibly decaying Higgs particles from the CERN LEP data