Recent lattice‐QCD calculations of the charmonium hybrid spectrum predict the ground state hybrid to be a spin‐exotic with quantum number JPC = 1 −+ at a mass of about 4.3 GeV/c2. Such a low mass hybrid could be as narrow as O(20MeV/c2) due to dynamical suppression of decay into open charm. The exotic quantum numbers prevent the state from mixing with conventional mesons and simplifies the identification of the state as a non‐meson state. Lattice calculations name the most obvious hybrid charmonium decay channel to be a conventional charmonium and light hadrons. The detection of such a final state with seven photons and a lepton pair within the future PANDA detector at GSI is investigated with Monte Carlo methods at Uppsala University.

Topics
Monte Carlo methods, Hadrons, Leptons, Mesons, Quantum chromodynamics
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© 2004 American Institute of Physics.
2004
American Institute of Physics
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