Model Analysis of the $ep \to ep'π^+π^-$ Electroproduction Reaction on the Proton

Details Model Analysis of the $ep \to ep'π^+π^-$ Electroproduction Reaction on the Proton Model Analysis of the $ep \to ep'π^+π^-$ Electroproduction Reaction on the Proton

2008-09-24

arxiv.org/abs/0809.4158v4

Phys.Rev.C80:045212,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevC.80.045212

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.

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