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The effect of pion-nucleon and nucleon-nucleon rescatterings on polarization observables of the reaction γ d → pp π − are calculated in the delta-isobar region. Pion-nucleon and nucleon-nucleon rescatterings are considered on the basis of a diagrammatic approach. Lorentz invariant expressions are used for the operators of photoproduction and of pion scattering on a free nucleon. A unitarization procedure in the K -matrix approximation is used for resonance partial-wave amplitudes. It is shown that, in the delta-resonance region, rescattering has a sizable effect on polarization observables of the reaction γ d → pp π − at high momenta of final protons.
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Loginov et al. (2000) studied this question.
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