The NN final-state interaction in the helicity structure of $\vec{d}(\vec{\gamma },{\pi }^{-})pp$ reaction

Abstract

The influence of final-state $NN$-rescattering on the helicity structure of the $\vec{\gamma }\vec{d}\to {\pi }^{-}pp$ reaction in the energy range from $\pi$-threshold up to 550 MeV has been investigated. The differential polarized cross-section difference for the parallel and antiparallel helicity states is predicted and compared with recent experimental data. It is shown that the effect of $NN$-rescattering is much less important in the polarized differential cross-section difference than in the previously studied unpolarized differential cross section. Furthermore, the contribution of $\vec{\gamma }\vec{d}\to {\pi }^{-}pp$ to the spin asymmetry of the deuteron is explicitly evaluated over the region of the $\Delta$(1232)-resonance with inclusion of $NN$-rescattering. The effect of $NN$ final-state interaction is found to be much larger in the asymmetry than in the total cross section and leads to an appreciable reduction of the spin asymmetry in the $\Delta$-region.

15 pages including 4 figures, accepted for publication in Nuclear Physics A

References in corpus (7)

• Influence of final state interaction on incoherent pion photoproduction on the deuteron in the region of the Delta-resonance
• Spin Asymmetry and Gerasimov-Drell-Hearn Sum Rule for the Deuteron
• Final state interaction in spin asymmetry and GDH sum rule for incoherent pion production on the deuteron
• A dressed bag model study of the final-state $N\Delta$ interaction in photoproduction processes off the deuteron
• Single-spin asymmetries of $d(\gamma ,\pi )NN$ in the first resonance region
• Spin observables for pion photoproduction on the deuteron in the $\Delta$(1232)-resonance region
• Polarization observables of the gamma d --> PiNN reaction in the Delta(1232)-resonance region

Cited by in corpus (5)

• Incoherent pion photoproduction on the deuteron with polarization observables II: Influence of final state rescattering
• Incoherent pion photoproduction on the deuteron in the first resonance region
• Incoherent pion photoproduction on the deuteron with polarization observables I: Formal expressions
• Final-state $NN$-rescattering in spin asymmetries of $d(\gamma ,{\pi }^{-})pp$ reaction
• Influence of $NN$-rescattering effect on the photon asymmetry of $d(\vec{\gamma },{\pi }^{-})pp$ reaction