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

TL;DR

This paper presents the extraction and analysis of differential cross sections for the gn-->pi-p process in the Delta-isobar region, using MAMI-B data and accounting for final-state interactions, with comparisons to previous measurements and analyses.

Contribution

It introduces a diagrammatic technique to extract cross sections from gd-->pi-pp data, considering final-state interactions, providing new insights into the Delta-isobar region.

Findings

Cross sections are successfully extracted with FSI effects accounted for.

Results are consistent with previous measurements and multipole analyses.

The method improves understanding of the gn-->pi-p process in the Delta 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.