Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-09-26
Few Body Syst.Suppl. 14 (2003) 281-286
Physics
Nuclear Physics
Nuclear Theory
6 pages latex including style files. Invited talk at XVIII European Conference on Few-Body Problems in Physics, September 2002
Scientific paper
The importance of three-body dynamics in the $\eta np$ system in elastic and inelastic $\eta$-deuteron scattering as well as coherent and incoherent $\eta$ photoproduction on the deuteron in the energy region from threshold up to 30 MeV above has been investigated. It is shown that a restriction to first order rescattering with respect to the $NN$- and $\eta N$-final state interactions, i.e., restriction to rescattering in the two-body subsystems, does not give a sufficiently accurate approximation to the s-wave reaction amplitude and that higher order terms, as described by the three-body dynamics give very substantial contributions.
Arenhoevel Hartmuth
Fix Alexander
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