Studies of the proton in the target fragmentation region

The proton and its internal structure have been studied for decades, providing phenomenal insights into its inner dynamics. Still, many remarkable questions remain unanswered. Even the most fundamental questions, such as the origin of its mass and its energy composition, remain uncertain. Currently, our Particle Physics group at Duquesne is exploring the origin of the proton through its underlying components using electron beams at Thomas Jefferson National Accelerator Facility.

In my presentation, I will focus on the Deep Inelastic regime and the peculiar workings of proton fragmentations, which subsequently generate current and target fragmentations in high-energy electron-proton scattering. Results on multi-dimensional analysis through single-spin asymmetries of longitudinally polarized electron beams off an unpolarized liquid hydrogen target will be presented.