; Zhao, Qiang] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
; [Zhao, Qiang] Univ Surrey, Dept Phys, Guildford GU2 7HX, Surrey, England
; [He, Jun
; Saghai, Bijan] CEA Saclay, DAPNIA SPhN, Lab Rech Lois Fondamentales Univers, F-91191 Gif Sur Yvette, France
A chiral quark-model approach is extended to the study of the pi N scattering at low energies. The process of pi(-) p -> eta n near threshold is investigated. The model is successful in describing the differential cross sections and total cross section near the eta production threshold. The roles of the resonances in n <= 2 shells are clarified. Near threshold, the S(11)(1535) dominates the reactions, whereas the interferences from the S(11)(1650) turn out to be destructive around W less than or similar to 1.6 GeV. The D(13)(1520) is crucial to give correct shapes of the differential cross sections. The nucleon pole term contributions are significant. The P(11)(1710) plays an important role around the center-of-mass energy W=1.7 GeV, it is crucial to produce an enhancement in the region of W > 1.6 GeV as suggested by the data for total cross section. The t-channel is negligible in the reactions.