–nucleon Coupling Constant *
نویسنده
چکیده
We derive the effective chiral Lagrangian for low-energy η–nucleon and η′– nucleon interactions and show that gluonic degrees of freedom, via the axial UA(1) anomaly, induce a contact term in the pp → ppη and pp → ppη′ reactions. We then discuss the consequences for the extraction of gη′NN from experimental data. ∗Work supported in part by BMBF.
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تاریخ انتشار 1999