Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.15: Poster
Thursday, March 19, 2009, 14:00–16:00, Audi-Max
Coupled-Channel Dynamics For Quarkonium Systems — •Ying Cui, Alexander Laschka, and Wolfram Weise — Institut für Theoretische Physik T39, Technische Universität München, D-85747 *Garching, Germany
We investigate charmonium (c c) and bottomonium (b b) coupled to the meson-meson system (DD and BB).
Using the bound state wavefunctions computed with a QQ potential derived from perturbative and lattice QCD,
we calculate the corrections to the binding energies of charmonium and bottomonium states arising from their coupling to the two-meson continuum. The interaction vertex between the mesons and the heavy-light states is obtained from heavy quark effective field theory. This is different from the 3P0 model, which assumes that the light quark pair is created from the vacuum. We also study the decay widths and wavefunction renormalization factors of heavy quark-antiquark bound states.
Work supported in part by BMBF and GSI.