Evaluation of the gn-->pi-p differential cross sections in the Delta-isobar region

Abstract

Differential cross sections for the process gn-->pi-p have been extracted from MAMI-B measurements of gd-->pi-pp, accounting for final-state interaction effects, using a diagrammatic technique taking into account the NN and piN final-state interaction amplitudes. Results are compared to previous measurements of the inverse process, pi-p--> ng, and recent multipole analyses.

6 pages, 4 figures. v2: Further clarifications and minor changes. A new figure inserted