Developments in Entanglement Enabled Spin Interference

Photonucelar processes have been understood for decades to be a golden channel for performing tomography of the gluon density and spatial distribution within nucleons and nuclei. The recent discovery of entanglement enabled spin interference in the angular distribution of $ ho^0 ightarrow pi^+pi^-$ from diffractive photonuclear interactions has opened new avenues for investigating the gluon distributions in heavy nuclei. However, the mechanism enabling this interference effect is still being investigated. In this talk I will summarize the current observations based on experimental results from multiple collaborations. Next, I will discuss the available theoretical models along with the implications for the future studies of gluon tomography in heavy ion collisions. Finally, I will discuss potential explanations for the entanglement enabling this novel form of interference.