The spectrum of charmonium in the Resonance-Spectrum Expansion
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چکیده
We argue that the resonance-like structures Y (4260) [1, 2], Y (4360), Y (4660) [3] and Y (4635) [4], which were recently reported to have been observed in experiment, are nonresonant manifestations of the Regge zeros that appear in the production amplitude of the Resonance-Spectrum Expansion. Charmonium cc̄ states are visible on the slopes of these enhancements. In the Resonance-Spectrum Expansion (RSE) [5], which is based on the model of Ref. [6], the meson-meson scattering amplitude is given by an expression of the form (here restricted to the one-channel case)
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تاریخ انتشار 2008