The Quark Model
نویسنده
چکیده
The reaction γ + p → η + p is investigated in the quark model approach. The quark model predicts that the off-shell contributions from the resonance S11(1535) dominate the η ′ production in the threshold region. We find that the coulping constant αη′NN from the fit to a few total cross section data is small. The results of the total and differential cross sections are presented at different energies, which can be tested in the future experiments. If the future total cross data indeed show a resonance structure around 2 GeV suggested in a recent study, it would be an evidence of a non qqq structure in its wavefunction. PACS Numbers: 24.85.+p, 12.39.-x, 13.60.Le ∗e-mail: [email protected]
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تاریخ انتشار 2008