Pi minus photoproduction from deuterium in the Regge regime*

Studying the photoproduction of hadrons can be used to learn more about the emergent properties of quantum chromodynamics. Data collected by the GlueX Experiment at Jefferson Lab, for instance, has allowed the study of a wide range of photoproduction reactions at beam energies near 8 GeV; though this data has been predominantly limited to using a proton target. I report on an analysis of data from the first experiment at GlueX to use a deuterium target, which allows the study of reactions on the neutron, i.e., an isospin-complete experiment. This project specifically looks at the photoproduction of a π– from a neutron. Since a deuterium target is the source of neutrons, the final state of the reaction includes a spectator proton in addition to the π– particle and proton (produced from the neutron). By detecting the spectator proton, additional background can be rejected during the analysis. A major challenge of this work is distinguishing this reaction from ρ0 production in which the π+ from the decay is mis-reconstructed as a proton. This talk will give an update on the data analysis of this project.