DOE OSTI · 3363292
Backward-Angle Electroproduction of η′ Mesons off Protons at W = 2.13 GeV and Q 2 = 0.46 (GeV/ c ) 2
Abstract
The electroproduction of $\eta ^{\prime }$ mesons from a $\mathrm{^{1}H}$ target at $W=\mathrm{2.13~GeV}$, $Q^{2} = 0.46~\left( \mathrm{GeV/}c\right)^{2}$, and $\cos \theta ^{\mathrm{CM}}_{\gamma ^{*}\eta ^{\prime }} \approx -1$ has been experimentally measured. The differential cross section of virtual photoproduction has been obtained as $4.4 \pm 0.8 ~\left( \mathrm{stat.} \right) \pm 0.4 ~\left( \mathrm{sys.} \right)~ \mathrm{nb/sr}$ 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 the validity of the theoretical framewark employed, but also imposes new constraints on coupling strength between the $\eta ^{\prime }p$ final state and nucleon resonances.
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Akiyama, T. [Tohoku Univ., Sendai (Japan)] (ORCID:0009000239296956), Bydžovský, P. [Czech Academy of Sciences (CAS), Prague (Czech Republic)], Gogami, T. [Kyoto Univ. (Japan)], Itabashi, K. [Osaka Univ. (Japan)], Nagao, S. [Univ. of Tokyo (Japan)], Nakamura, S. N. [Tohoku Univ., Sendai (Japan); Univ. of Tokyo (Japan)], Okuyama, K. [Tohoku Univ., Sendai (Japan)], Pandey, B. [Hampton Univ., Hampton, VA (United States); Virginia Military Inst., Lexington, VA (United States)], Skoupil, D. [Czech Academy of Sciences (CAS), Prague (Czech Republic)], Suzuki, K. N. [Kyoto Univ. (Japan)], Tang, L. [Hampton Univ., Hampton, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)], Abrams, D. [Univ. of Virginia, Charlottesville, VA (United States)], Androic, D. [Univ. of Zagreb (Croatia)], Aniol, K. [California State Univ. (CalState), Long Beach, CA (United States)], Ayerbe Gayoso, C. 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[Istituto Nazionale di Fisica Nucleare (INFN), Rome (Italy); Sapienza Univ. of Rome (Italy)], Meekins, D. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)], Michaels, R. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)], Mihovilovič, M. [Univ. of Ljubljana (Slovenia); Johannes Gutenberg Univ., Mainz (Germany); Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)], Moyer, A. [Christopher Newport Univ., Newport News, VA (United States)], Nguyen, D. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Hue Univ. (Vietnam)], Nycz, M. [Kent State Univ., Kent, OH (United States)], Owen, V. [College of William and Mary, Williamsburg, VA (United States)], Palatchi, C. [Indiana Univ., Bloomington, IN (United States)], Park, S. [State Univ. of New York (SUNY), Stony Brook, NY (United States)], Petkovic, T. [Univ. of Zagreb (Croatia)], Premathilake, S. 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[Istituto Nazionale di Fisica Nucleare (INFN), Rome (Italy)], Votaw, D. [Michigan State Univ., East Lansing, MI (United States)], Williamson, J. [Univ. of Glasgow, Scotland (United Kingdom)], Wojtsekhowski, B. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)], Wood, S. A. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)], Yale, B. [Univ. of New Hampshire, Durham, NH (United States)], Ye, Z. [Argonne National Laboratory (ANL), Argonne, IL (United States)], Zhang, J. [Univ. of Virginia, Charlottesville, VA (United States)], Zheng, X. [Univ. of Virginia, Charlottesville, VA (United States)]. 2026-03-12. Backward-Angle Electroproduction of η′ Mesons off Protons at W = 2.13 GeV and Q 2 = 0.46 (GeV/ c ) 2. https://doi.org/10.1093/ptep%2Fptag049
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