Description
The search for mesons outside of the Constituent Quark Model
has persisted for over thirty years. Meson spectroscopy is
presently going through a revival with the advent of new experiments
with high statistics. Theoretically, the Constituent Quark Model is finally being understood from more basic principles using discrete calculations of Quantum Chromodynamics, and is approaching predictive power for the
spectrum of hadron resonances as well as the decay of those resonances.
The decays of mesons containing heavy quarks has potential for producing final states of matter with unusual quark configurations. Here I summarize the experimental status of mesons beyond the Constituent Quark Model in both the light and heavy quark sectors.
