Coherent Photoproduction of Eta-Mesons on Spin-Zero Nuclei in a Relativistic, Non-local Model

Abstract

The coherent photoproduction of $\eta$-mesons on spin-zero nuclei is studied in a relativistic, non-local model, which we have previously applied to the coherent photoproduction of pions. We find that different off-shell extrapolations of the elementary production operator lead to large effects in the cross section. We also show that the almost complete suppression of the N(1535) seen in earlier studies on this reaction is a result of the local or factorization approximation used in these works. Non-local effects can lead to a considerable contribution from this resonance. The relative size of the N(1535) contribution depends on the structure of the nucleus under consideration. We give an estimate for the contribution of the N(1520) resonance and discuss the effect of an $\eta$-nucleus optical potential

29 pages, 14 figures; slight changes in presentation, extended discussion, one new figure

References in corpus (6)

• Many Body approach to the inclusive $(e,e^{\prime })$ reaction from the quasielastic to the $\Delta$ excitation region
• Coherent Photoproduction of Pions on Spin-Zero Nuclei in a relativistic, non-local Model
• Coherent $\eta$-photoproduction on ${}^4$He and ${}^{12}$C in the near-threshold region
• The energy dependence of the in-medium $\eta N$ cross section evaluated from $\eta$-photoproduction
• Coherent eta-photoproduction from nuclei in a relativistic impulse approximation approach
• Nuclear dependence of the coherent eta photoproduction reaction in a relativistic approach

Cited by in corpus (15)

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• Primakoff production of ${\pi }^0$, $\eta$ and ${\eta }^{\prime }$ in the Coulomb field of a nucleus
• A relativistic two-nucleon model for $A(p,K^{+}){}_{\Lambda }B$ reaction
• Exclusive $K^{+}$ production in proton-nucleus collisions
• Relativistic Calculations for Incoherent Photoproduction of Eta Mesons
• Resonance dynamics in the coherent $\eta$ meson production in the $(p,p^{\prime })$ reaction on the spin-isospin saturated nucleus
• Non-locality and Medium Effects in the Exclusive Photoproduction of Eta Mesons on Nuclei
• Inclusive Photoproduction of $\eta$ Mesons on Nuclei and the in-medium properties of the S${}_{11}$ Resonance
• Interactions of $\omega$-Mesons in Nuclear Matter and with Nuclei
• Quasifree eta photoproduction from nuclei and medium modifications of resonances
• 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