2000/11/08 by N. V. Shevchenko, V. B. Belyaev, V.B. Belyaev +8
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/0011027
11 pages, LaTex, 9 eps figures, 1 table; reference list was corrected and acknowledgments were added. Talk given at the IX International seminar "Electromagnetic interactions of nuclei at low and medium energies", INR, Moscow, 20-22 September 2000; to be published in the proceedings
openalex publication_date 2000/11/08 · arxiv created 2001/05/17 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Photo-production of η-mesons and their collisions with light nuclei are studied within the Alt-Grassberger-Sandhas (AGS) formalism for different parameters of ηN interaction. A three-body resonance or a quasi-bound state is found close to the ηd threshold. Expected manifestation of this resonant behavior of ηd elastic scattering in various processes involving ηd-system in their final states was found in calculations of the γd → ηd 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 ηd scattering. Meanwhile, such peaks did not appear in the impulse approximation (i.e. when ηd resonance was not taken into account). This sheds some light on the nature of the enhancement of η photo-production on deuteron observed recently in the low energy experiments.