Backward-angle electroproduction of ${\eta }^{\prime }$ mesons off protons at $W=2.13\text{GeV}$ and $Q^2=0.46{\left(\text{GeV}/c\right)}^2$

Abstract

The electroproduction of ${\eta }^{\prime }$ mesons from a ${}^1\mathrm{H}$ target at $W=2.13\text{GeV}$, $Q^2=0.46{\left(\text{GeV}/c\right)}^2$ and $\cos {\theta }_{{\gamma }^{\ast }{\eta }^{\prime }}^{\text{CM}}\approx -1$ has been experimentally measured. The differential cross section of virtual-photoproduction has been obtained as $4.4\pm 0.8\left(\text{stat.}\right)\pm 0.4\left(\text{sys.}\right)\text{nb/sr}$ 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 constrains on coupling strength between the ${\eta }^{\prime }p$ final state and nucleon resonances.

arXiv comment27 pages, 9 figures

References in corpus (33)

• Photoproduction of $\eta$ and $\eta \prime$ Mesons off Protons
• Differential cross sections for the reactions gamma p-> p eta and gamma p -> p eta-prime
• Effect of recent R_p and R_n measurements on extended Gari-Krumpelmann model fits to nucleon electromagnetic form factors
• η- and η'-mesic nuclei and U_A(1) anomaly at finite density
• High resolution hypernuclear spectroscopy using the (e,e'K+) reaction
• Transparency ratio in γA -> η' A' and the in-medium η' width
• Observation of the Helium 7 Lambda hypernucleus by the (e,e'K+) reaction
• Determination of the η'-nucleus optical potential
• Formation of η'(958)-mesic nuclei and axial U_A(1) anomaly at finite density
• Data analysis techniques, differential cross sections, and spin density matrix elements for the reaction $\gamma p\to \varphi p$
• High Resolution Spectroscopic Study of ${}_{\Lambda }^{10}$Be
• Analysis of U${}_A$(1) symmetry-breaking and restoration effects on the scalar-pseudoscalar spectrum
• eta-prime photoproduction on the proton for photon energies from 1.527 to 2.227 GeV
• High Resolution Spectroscopy of 12B_Lambda by Electroproduction
• High Resolution Spectroscopy of 16N_Lambda by Electroproduction
• Study of $\eta$ and ${\eta }^{\prime }$ photoproduction at MAMI
• The experiments with the High Resolution Kaon Spectrometer at JLab Hall C and the new spectroscopy of ${}_{\Lambda }^{12}\text{B}$ hypernuclei
• Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
• Photon beam asymmetry $\Sigma$ for $\eta$ and ${\eta }^{\prime }$ photoproduction from the proton
• Photoproduction of $K\Lambda$ on the proton
• Photo- and electroproduction of $K^{+}\Lambda$ with unitarity-restored isobar model
• Momentum dependence of the imaginary part of the $\omega$- and ${\eta }^{\prime }$-nucleus optical potential
• Missing-mass spectroscopy of the ${}^{12}\mathrm{C}(p,d)$ reaction near the ${\eta }^{\prime }$-meson production threshold
• First Measurement of the $\Sigma$ Beam Asymmetry in ${\eta }^{\prime }$ Photoproduction off the Proton near Threshold
• Spectroscopy of Lambda-9Li by electroproduction
• Density Changes in Low Pressure Gas Targets for Electron Scattering Experiments
• Search for ${\eta }^{\prime }$ bound nuclei in the ${}^{12}\mathrm{C}(\gamma ,p)$ reaction with simultaneous detection of decay products
• The η'-carbon potential at low meson momenta
• Backward-angle photoproduction of $\omega$ and ${\eta }^{\prime }$ mesons from protons at $E_{\gamma }=1.5-3.0$ GeV
• Model selection for $K^{+}{\Sigma }^{-}$ photoproduction within isobar model
• The cross-section measurement for the ${}^3\text{H}(e,e^{\prime }{K}^{+})nn\Lambda$ reaction
• Beam Position Reconstruction for the g2p Experiment in Hall A at Jefferson Lab
• ${\eta }^{\prime }$ meson under partial restoration of chiral symmetry in nuclear medium