1998/06/30 by Frieder Kleefeld, Manfred Dillig
Physics and Astronomy · #nucl-th
published as Acta Phys.Polon. B29 (1998) 3059-3064 · 5 pages, 5 figures (corrected for spelling mistakes)
arxiv created 1998/08/09 · arxiv updated 2009/12/01
pp→ ppπ0 and pp→ ppη were considered close to threshold. The pion production was found not only to be dominated by impulse approximation (IA) and rescattering contributions, but also strongly by box-diagrams, resonances and heavy-meson exchanges. New relevant contributions for the IA were found. The role of the offshell behaviour of nucleon-resonance couplings (P11(1440), S11(1535)) and of interference effects for the eta production was investigated. The results opened a large door for microsopic understanding of short range physics. A covariant model for pp→ ppη being under construction is going to be finished.