Model Analysis of the $ep\to e{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction Reaction on the Proton

Abstract

Recent CLAS data on the $p{\pi }^{+}{\pi }^{-}$ electroproduction off protons at 1.3$<$W$<$1.57 GeV and 0.25$<$$Q^2$$<$0.6 GeV${}^2$ have been analyzed using a meson-baryon phenomenological model. By fitting nine 1-fold differential cross section data for each $W$ and $Q^2$ bin, the charged double pion electroproduction mechanisms are identified from their manifestations in the observables. We have extracted the cross sections from amplitudes of each of the considered isobar channels as well as from their coherent sum. We also obtained non-resonant partial wave amplitudes of all contributing isobar channels which could be useful for advancing a complete coupled-channel analysis of all meson electroproduction data.

Experiment Numbers: E93-006, E94-005 Group: Hall B

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Cited by in corpus (18)

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• A systematic study of longitudinal and transverse helicity amplidutes in the hypercentral Constituent Quark Model
• Measurements of $ep\to e^{\prime }{\pi }^{+}n$ at W = 1.6 - 2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS
• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Electroproduction of the Roper resonance on the proton: the role of the three-quark core and the molecular N-sigma component
• Measurements of $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$ Cross Sections with CLAS at $1.40<W<2.0$ GeV and $2.0<Q^2<5.0$ GeV${}^2$
• Evidence for the $N^{\prime }(1720)3/2^{+}$ Nucleon Resonance from Combined Studies of CLAS ${\pi }^{+}{\pi }^{-}p$ Photo- and Electroproduction Data
• Electromagnetic Transition Form Factors of Baryon Resonances
• Dalitz plots and lineshape of $a_1(1260)$ from a relativistic three-body unitary approach
• Photo- and Electrocouplings of Nucleon Resonances
• Two-photon exchange from intermediate state resonances in elastic electron-proton scattering
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Exclusive ${\mathbf{\pi }}^0\mathbf{p}$ electroproduction off protons in the resonance region at photon virtualities 0.4~GeV${}^2$ $\le {\mathbf{Q}}^2\le 1$~GeV${}^2$
• Phenomenological study on the $\bar{p}N\to \bar{N}N\pi \pi$ reactions
• $\Delta$-baryon axialvector and pseudoscalar form factors, and associated PCAC relations
• Electromagnetic transition form factors of nucleons from the hard-wall AdS/QCD model
• Meson Production and Baryon Resonances at CLAS
• Systematic study of longitudinal and transverse helicity amplitudes in the hypercentral Constituent Quark Model