  A recent HyperCP observation of three events in the decay Sigma^+ -> p mu^+
mu^- is suggestive of a new particle with mass 214.3 MeV. In order to confront
models that contain a light Higgs boson with this observation, it is necessary
to know the Higgs production rate in hyperon decay. The contribution to this
rate from penguin-like two-quark operators has been considered before and found
to be too large. We point out that there are additional four-quark
contributions to this rate that could be comparable in size with the two-quark
contributions, and that could bring the total rate to the observed level in
some models. To this effect we implement the low-energy theorems that dictate
the couplings of light Higgs bosons to hyperons at leading order in chiral
perturbation theory. We consider the cases of scalar and pseudoscalar Higgs
bosons in the standard model and in its two-Higgs-doublet extensions to
illustrate the challenges posed by existing experimental constraints and
suggest possible avenues for models to satisfy them.
