The Role of the D13 (1520) Resonance in eta Electroproduction

Abstract

We investigate the electroproduction of eta mesons below a center of momentum energy of 1.6 GeV, with particular emphasis on the roles of the N*(1535) and N*(1520) resonances. Using the effective Lagrangian approach, we show that the transverse helicity amplitude of the N*(1535) can be extracted with good accuracy from the new eta electroproduction data, under reasonable assumptions for the strength of the longitudinal helicity amplitude. In addition, although the differential cross section is found to to have a small sensitivity to the N*(1520) resonance, it is shown that a recently completed double polarization experiment is very sensitive to this resonance.

arXiv comment7 pages, Revtex, 3 figures

References in corpus (5)

• Electroproduction of the Delta Resonance at High Momentum Transfer
• Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{\ast }(1535)$ Region
• Electroproduction of the S11(1535) Resonance at High Momentum Transfer
• Model-Independent Extraction of the N*(1535) Electrostrong Form Factor from Eta Electroproduction
• Extraction of Electrostrong Parameters of $N^{\ast }(1520)$ from Eta Photoproduction

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• Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Quark model approach to the $\eta$ meson electroproduction on the proton
• Charged current (anti)neutrino induced eta production off the nucleon
• Irreducible tensor approach to spin observables in photo production of mesons with arbitrary spin-parity $s^{\pi }$