Abstract
Eur.Phys.J. A17 (2003) 513-517 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.