Quark-Hadron Duality in Photoabsorption Sum Rules and Two Photon Decays of Meson Resonances
arXiv:hep-ph/0212281 · doi:10.1142/9789812705167_0002
Abstract
The idea of quark-hadron duality is developed and applied to integral sum rules for the photoexcitation of meson resonances. Some applications of the presented approach in the light and heavy quark sectors are made, and the role of the scalar diquark cluster degrees of freedom in the radiative formation of light scalar mesons is discussed.
arXiv comment7 pages, Latex, no figures; Talk given at the 2nd International Symposium on the Gerasimov-Drell-Hearn Sum Rule and the Spin Structure of the Nucleon, Genova, Italy, July 3-6, 2002