Backward-angle electroproduction of η′ mesons off protons at W=2.13 GeV and Q2=0.46 (GeV/c)2
This paper reports the first experimental measurement of backward-angle η′ meson electroproduction off protons at W=2.13 GeV and Q2=0.46 (GeV/c)2, yielding a differential cross section significantly lower than real-photoproduction values and providing new constraints on nucleon resonance couplings within an isobar model framework.
T. Akiyama, P. Bydžovský, T. Gogami, K. Itabashi, S. Nagao, S. N. Nakamura, K. Okuyama, B. Pandey, D. Skoupil, K. N. Suzuki, L. Tang, D. Abrams, D. Androic, K. Aniol, C. Ayerbe Gayoso, J. Bane, S. Bar (…)2026-04-22⚛️ nucl-ex