Abstract The electroproduction of η′ mesons from a 1H target at W = 2. 13GeV, Q2 = 0. 46 (GeV/c) 2 and ^CM ^* ^{ } -1 has been experimentally measured. The differential cross section of virtual-photoproduction has been obtained as 4. 4 ± 0. 8 (stat. ) ± 0. 4 (sys. ) nb/sr in the One-Photon-Exchange Approximation. This value is one-sixth of that of real-photoproduction at backward angles. A comparison with newly-developed isobar model calculations not only shows validity of the theoretical framewark employed, but also imposes new constraints on coupling strength between the η′p final state and nucleon resonances.
Akiyama et al. (Wed,) studied this question.