Quark model approach to the $\eta$ meson electroproduction on the proton

Abstract

A recently developed quark model approach to pseudoscalar meson photoproduction is extended to electroproduction process for the $\eta$ meson in the kinematics of momentum transfer $Q^2\le$ 4 (GeV/c)${}^2$ and total center of mass energy $W\le$ 1.6 GeV. Existing data are well reproduced and the roles of the $S_{11}(1535)$ and $D_{13}(1520)$ resonances are closely investigated. In the study of the longitudinal excitation of the $S_{11}(1535)$ resonance, a reliable constraint on the $S_{11}(1535)$ properties is obtained by cleanly removing the electromagnetic transition from the ${\gamma }_{(v)}p\to S_{11}(1535)\to \eta p$ amplitude. Thus, the fitted quantities can be determined with an uncertainty of about 15%. This could be the first direct constraint on the $S_{11}(1535)$ properties in theory.

31 pages, 9 figures; Substantially modified version, to appear on Jour. of Phys. G

References in corpus (5)

• The e p -> e' p eta reaction at and above the S11(1535) baryon resonance
• Differential cross section measurement of eta photoproduction on the proton from threshold to 1100 MeV
• Quark Model Study of The eta Photoproduction: Evidence for a New S11 Resonance?
• The $\eta NN$ coupling constant
• The Role of the D13 (1520) Resonance in eta Electroproduction

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• A quark model framework for the study of nuclear medium effects