Quasifree pion photoproduction from the deuteron in the energy region from threshold up to the Δ(1232)-resonance including polarization observables

Abstract

Quasifree pion photoproduction from the deuteron including polarization observables is studied in the energy region from threshold up to the Δ(1232)-resonance with inclusion of all leading πNN effects. For the elementary pion photoproduction operator, a realistic effective Lagrangian approach is used which displays chiral symmetry, gauge invariance, and crossing symmetry, as well as a consistent treatment of the spin-3/2 interaction. The interactions in the final two-body subsystems are taken in separable form. The sensitivity of the results to the elementary N(γ,π)N operator is investigated. A considerable dependence on the elementary amplitude of the target asymmetry for the d(γ,π)NN case is found. This indicates that this observable can serve to test different choices of elementary operators.