Quark-hadron duality and meson-meson scattering amplitudes |
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Authors: | V V Anisovich B Ch Metsch H R Petry A V Sarantsev |
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Institution: | 1. St. Petersburg Nuclear Physics Institute, 188350, Gatchina, Russia 2. Institut für Theoretische Kernphysik, Nussallee 14–16, D-53115, Bonn, Germany
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Abstract: | We investigate a special concept of quarkhadron duality in meson physics at low and intermediate energies. With a relativistic propagator for confined quarks, we calculated masses and widths of the mesons which areS- andP-wave states ofq¯q (J P=0?, 1?, 0+, 1+c, 2+) as well as meson-meson scattering amplitudes at energies up totrs ≤ 1.3 GeV by including light pseudoscalar and vector mesons into the interaction dynamics. Our investigation shows that the influence of the light meson dynamics resutls in: - a contribution to the constituent quark mass of approximately 200 MeV.
- the appearance of a new soft confinement force barrier responsible for the formation of the highly excited meson states.
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