Exotic states of matter in heavy meson decays

The potential of decays of mesons containing heavy quarks [including B mesons and the ${\rm Y}\mathrm{}\left(1S\right)\mathrm{}]$ for producing final states of matter with unusual quark configurations, such as $\mathrm{qq}\overline{q}\overline{q}$ or $\mathrm{qqqq}\overline{q},$ is investigated. The usefulness of antineutron detection in such searches is stressed.