Electroproduction of Eta Mesons in the S11(1535) Resonance Region at High Momentum Transfer

Abstract

The differential cross-section for the process p(e,e'p)eta has been measured at Q2 ~ 5.7 and 7.0 (GeV/c)2 for centre-of-mass energies from threshold to 1.8 GeV, encompassing the S11(1535) resonance, which dominates the channel. This is the highest momentum transfer measurement of this exclusive process to date. The helicity-conserving transition amplitude A_1/2, for the production of the S11(1535) resonance, is extracted from the data. Within the limited Q2 now measured, this quantity appears to begin scaling as 1/Q3 - a predicted, but not definitive, signal of the dominance of perturbative QCD, at Q2 ~ 5 (GeV/c)2.

LaTeX, 30 pages, 29 figures, uses longtable.sty, slashbox.sty, ifthen.sty; (v2) corrected figure inclusions; (v3) changes in filenames for prc and added Report-no; (v4) correction based on comments from referee {small changes to abstract and conclusion, inserted figure 9, other small changes to the text} (v5) very minor additions to improve clarity

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Cited by in corpus (34)

• Baryon spectroscopy
• Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
• Electroexcitation of nucleon resonances
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Nucleon electromagnetic form factors and electroexcitation of low lying nucleon resonances in a light-front relativistic quark model
• Applications of quark-hadron duality in F2 structure function
• Structure of the nucleon's low-lying excitations
• A covariant model for the gamma N -> N(1535) transition at high momentum transfer
• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• Electroproduction of the N*(1535) resonance at large momentum transfer
• Electroproduction of the $N^{\ast }(1535)$ nucleon resonance in QCD
• Nucleon resonance contributions to unpolarised inclusive electron scattering
• Electromagnetic Transition Form Factors of Baryon Resonances
• Spectrum and structure of octet and decuplet baryons and their positive-parity excitations
• A simple relation between the gamma N -> N(1535) helicity amplitudes
• Results from the N* program at JLab
• Neutral Pion Electroproduction in the Resonance Region at High $Q^2$
• Using the Single Quark Transition Model to predict nucleon resonance amplitudes
• Electroexcitation of nucleon resonances of the [70,1-] multiplet in a light-front relativistic quark model
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Semirelativistic approximation to the ${\gamma }^{\ast }N\to N(1520)$ and ${\gamma }^{\ast }N\to N(1535)$ transition form factors
• $N^{\ast }$ Form Factors based on a Covariant Quark Model
• Measurements of the ${\gamma }_{v}p\to p^{\prime }{\pi }^{+}{\pi }^{-}$ cross section with the CLAS detector for $0.4$ GeV${}^2$ $<Q^2<$ $1.0$ GeV${}^2$ and $1.3$ GeV $<W<$ $1.825$ GeV
• Transition form factors and helicity amplitudes for electroexcitation of negative- and positive parity nucleon resonances in a light-front quark model
• Covariant model for the Dalitz decay of the $N(1535)$ resonance
• Electroexcitation of nucleon resonances in a light-front relativistic quark model
• Structure of the orbital excited $N^{\ast }$ from the Schwinger-Dyson equations
• The decays ${\Lambda }_{b,c}\to N^{\ast }l\nu$ in QCD
• Electromagnetic transition form factors of nucleons from the hard-wall AdS/QCD model
• New Results on Nucleon Resonance Transition Form Factors
• Electroproduction of Resonances at Large Momentum Transfers
• Light-cone sum rule approach for Baryon form factors
• Helicity amplitudes of $N(1520)$ and $N(1535)$ including pentaquark components