  Higgs production from $Z$ decay in supersymmetry with spontaneous broken R
parity proceeds mostly by the Bjorken process as in the standard model.
However, the corresponding production rates can be weaker than in the standard
model (SM), especially in the low mass region. This will substantially weaken
the Higgs boson mass limits derived from LEP1. More strikingly, the main Higgs
decay channel is "invisible", over most of the mass range accessible to LEP1,
leading to events with large missing energy carried by majorons. This
possibility should be taken into account in the planning of Higgs boson search
strategies not only at LEP but also at high energy supercolliders.
