Final state interaction in spin asymmetry and GDH sum rule for incoherent pion production on the deuteron

Abstract

The contribution of incoherent single pion photoproduction to the spin response of the deuteron, i.e., the asymmetry of the total photoabsorption cross section with respect to parallel and antiparallel spins of photon and deuteron, is calculated over the region of the $\Delta$-resonance with inclusion of final state $NN$- and $\pi N$-rescattering. Sizeable effects, mainly from $NN$-rescattering, are found leading to an appreciable reduction of the spin asymmetry. Furthermore, the contribution to the Gerasimov-Drell-Hearn integral is explicitly evaluated by integration up to a photon energy of 550 MeV. Final state interaction reduces the value of the integral to about half of the value obtained for the pure impulse approximation.

4 pages EPJ style including 4 postscript figures

References in corpus (4)

• A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV
• Influence of final state interaction on incoherent pion photoproduction on the deuteron in the region of the Delta-resonance
• The Drell-Hearn-Gerasimov Sum Rule
• Quasifree pion photoproduction on the deuteron in the $\Delta$ region

Cited by in corpus (9)

• Incoherent pion photoproduction on the deuteron with polarization observables II: Influence of final state rescattering
• Spin Asymmetry and Gerasimov-Drell-Hearn Sum Rule for the Deuteron
• Incoherent pion photoproduction on the deuteron with polarization observables I: Formal expressions
• 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
• The NN final-state interaction in the helicity structure of $\vec{d}(\vec{\gamma },{\pi }^{-})pp$ reaction
• Polarization observables of the gamma d --> PiNN reaction in the Delta(1232)-resonance region
• Final-state $NN$-rescattering in spin asymmetries of $d(\gamma ,{\pi }^{-})pp$ reaction
• The generalized Gerasimov-Drell-Hearn sum rule for deuteron electrodisintegration