Discovering invisible Higgs bosons at the Compact Muon Solenoid Detector

In some extensions of the Standard Model, the lightest Higgs boson can undergo mainly invisible decays, decaying to a pair of the lightest super-symmetric partners, or to Goldstone bosons, or to Majorans, none of which interact in the detector. Thus it is not clear how such a Higgs boson can be detected. It is shown that associated production of such Higgs bosons with Z's at high-luminosity hadron colliders can provide a detectable signal for the mass region of most interest, M$\sb{\rm h}$ $\le$ 160 GeV. If the Z production spectrum can be accurately measured, then M$\sb{\rm h}$ may be determined. If a Higgs boson is detected another way, so that M$\sb{\rm h}$ is known, this method may allow a measurement of branching ratio (BR(h $\to$ invisible), and may also allow measurement of other BR.