The e p -> e' p eta reaction at and above the S11(1535) baryon resonance

Abstract

New cross sections for the reaction e p -> ep eta are reported for total center of mass energy W = 1.5--1.86 GeV and invariant momentum transfer Q^2 = 0.25--1.5 GeV^2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and eta N coupling strengths of baryon resonances. Expanded W coverage shows sharp structure at W \~ 1.7 GeV; this is shown to come from interference between S and P waves and can be interpreted in terms of known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

11 pages, RevTeX, 5 figures, submitted to Phys. Rev. Lett

References in corpus (8)

• SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon Photoproduction
• Baryon Current Matrix Elements in a Light-Front Framework
• Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model
• Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{\ast }(1535)$ Region
• The $\eta$NN Coupling in Eta Photoproduction
• Photo- and Electroproduction of Eta Mesons
• Baryon Masses from Lattice QCD: Beyond the Perturbative Chiral Regime
• Electroproduction of the S11(1535) Resonance at High Momentum Transfer

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