Recoil polarization and beam-recoil double polarization measurement of ηelectroproduction on the proton in the region of the S_{11}(1535) resonance

Abstract

The beam-recoil double polarization P_{x'}^h and P_{z'}^h and the recoil polarization P_{y'} were measured for the first time for the p(\vec{e},e'\vec{p})ηreaction at a four-momentum transfer of Q^2=0.1 GeV^2/c^2 and a center of mass production angle of θ= 120^\circ at MAMI C. With a center of mass energy range of 1500 MeV < W < 1550 MeV the region of the S_{11}(1535) and D_{13}(1520) resonance was covered. The results are discussed in the framework of a phenomenological isobar model (Eta-MAID). While P_{x'}^h and P_{z'}^h are in good agreement with the model, P_{y'} shows a significant deviation, consistent with existing photoproduction data on the polarized-target asymmetry.

arXiv comment4 pages, 1 figure

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• Electroproduction of the S11(1535) Resonance at High Momentum Transfer
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• Analysis of resonance multipoles from polarization observables in eta photoproduction
• The focal plane proton-polarimeter for the 3-spectrometer setup at MAMI

Cited by in corpus (7)

• Baryon spectroscopy
• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Empirical transverse charge densities in the nucleon-to-P11(1440) transition
• Measurement of the transverse target and beam-target asymmetries in $\eta$ meson photoproduction at MAMI
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Hadron structure at small momentum transfer
• Polar polarization: a new method for polarimetry analysis