Quantum Chromodynamics (QCD) is the only known example in nature of a fundamental quantum field theory that is innately non-perturbative. Solving QCD will have profound implications for our understanding of the natural world, for example, it will explain how light quarks and massless gluons bind together to form the observed mesons and baryons and hence the origin of more than 98% of the visible mass in the universe. Given QCD's complexity, the best promise for progress is a strong interplay between experiment and theory. I will discuss several theoretical studies in continuum QCD that have been motivated by key experimental results that challenged our understanding of nucleon and nuclear structure. For example, the proton GE/GM form factor ratio, EMC effect and NuTeV anomaly. A perspective will be given on what these experiments tell us about the non-perturbative structure of QCD and several predictions will be presented that should be tested in future experiments.
Back to the theory seminar page.