The challenge of understanding the nucleon's structure and dynamics has occupied a central place in nuclear physics.)
[1][2][3] The fundamental understanding of structure functions in terms of QCD is one of the outstanding problems in hadron physics.
Why do quarks form colourless hadrons with only two stable configurations, proton and neutron?
One important step towards answering this question is to characterize the internal structure of the nucleon.
High energy electron scattering provides one of the most powerful tools to investigate this structure.