Journal article

Publication year: 1998

Pages: 506-530

Journal: Nuclear Physics A: Nuclear and Hadronic Physics

Volume number: 642

Issue number: 3-4

ISSN: 0375-9474

Open access status: Green

DOI Link: https://doi.org/10.1016/S0375-9474(98)00538-7

Publisher: Elsevier

Abstract: 
The coherent photoproduction of eta-mesons on spin-zero nuclei is studied in a relativistic, nonlocal 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. (C) 1998 Elsevier Science B.V.

Harvard Citation style: Peters, W., Lenske, H. and Mosel, U. (1998) Coherent photoproduction of eta-mesons on spin-zero nuclei in a relativistic, non-local model, Nuclear Physics A: Nuclear and Hadronic Physics, 642(3-4), pp. 506-530. https://doi.org/10.1016/S0375-9474(98)00538-7

APA Citation style: Peters, W., Lenske, H., & Mosel, U. (1998). Coherent photoproduction of eta-mesons on spin-zero nuclei in a relativistic, non-local model. Nuclear Physics A: Nuclear and Hadronic Physics. 642(3-4), 506-530. https://doi.org/10.1016/S0375-9474(98)00538-7