Coherent $\eta$-photoproduction on ${}^4$He and ${}^{12}$C in the near-threshold region

Abstract

Coherent $\eta$ meson photoproduction on ${}^4$He and ${}^{12}$C is considered in the near-threshold region. The elementary $\eta$ photoproduction operator includes contributions from the $S_{11}(1535)$ and $D_{13}(1520)$ resonances as well as $t$-channel vector meson exchange and the nucleon pole terms. Due to the suppression of the dominant $S_{11}(1535)$ resonance for spin and isospin saturated nuclei, the reaction is mainly governed by $\omega$ exchange. Furthermore, the influence of Fermi motion and of different prescriptions for the choice of the invariant reaction energy $W_{\gamma N}$ in the elementary amplitude is studied.

27 pages revtex including 9 postscript figures

Cited by in corpus (11)

• Influence of final state interaction on incoherent η-photoproduction on the deuteron near threshold
• Photoproduction of ηmesons on protons in the resonance region:The background problem and the third S_11 resonance
• Coherent Photoproduction of Eta-Mesons on Spin-Zero Nuclei in a Relativistic, Non-local Model
• Coherent pi0-pi0 photoproduction on lightest nuclei
• Nuclear dependence of the coherent eta photoproduction reaction in a relativistic approach
• Relativistic Calculations for Incoherent Photoproduction of Eta Mesons
• Non-locality and Medium Effects in the Exclusive Photoproduction of Eta Mesons on Nuclei
• Resonance dynamics in the coherent $\eta$ meson production in the $(p,p^{\prime })$ reaction on the spin-isospin saturated nucleus
• Inclusive Photoproduction of $\eta$ Mesons on Nuclei and the in-medium properties of the S${}_{11}$ Resonance
• Hadron interferences in the proton induced coherent $\eta$ meson production reaction on a scalar-isovector nucleus
• Forward coherent $\omega$ and $\varphi$ mesons production in the photon induced reaction on nuclei