Franck-Condon principle for heavy-quark hadron decays
  The Franck-Condon principle governing molecular electronic transitions is utilized to study heavy-quark hadron decays. This provides a direct assessment of the wavefunction of the parent hadron if the momentum distribution of the open-flavor decay products is measured. Model-independent results include an experimental distinction between quarkonium and exotica (hybrids, tetraquarks...), an off-plane correlator signature for tetraquarks and a direct probe of the sea quark orbital wavefunction relevant in the discussion of 3S_1 or 3P_0 decay mechanisms. 
Felipe J. Llanes-Estrada (Complutense), Stephen R. Cotanch (NCSU),   Ignacio G. General (Duquesne), Ping Wang (TJNAF)