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Low energy scattering and photoproduction of $eta$-mesons on deuterons | N. V. Shevchenko
; V. B. Belyaev
; S. A. Rakityansky
; S. A. Sofianos
; W. Sandhas
; | Date: |
8 Nov 2000 | Subject: | nucl-th | Abstract: | Photo-production of $eta$-mesons and their collisions with light nuclei are studied within the Alt-Grassberger-Sandhas (AGS) formalism for different parameters of $eta N$ interaction. A three-body resonance or a quasi-bound state is found close to the $eta d$ threshold. Expected manifestation of this resonant behavior of $eta d$ elastic scattering in various processes involving $eta d$-system in their final states was found in calculations of the $gamma d o eta d$ reaction in the framework of modified AGS equations. These calculations revealed peaks in the energy dependence of the total cross-section almost at the same energies as in the elastic $eta d$ scattering. Meanwhile, such peaks did not appear in the impulse approximation (i.e. when $eta d$ resonance was not taken into account). This sheds some light on the nature of the enhancement of $eta$ photo-production on deuteron observed recently in the low energy experiments. | Source: | arXiv, nucl-th/0011027 | Services: | Forum | Review | PDF | Favorites |
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