Understanding the emergence of the nucleon structures in terms of QCD degrees of freedom, i.e. quarks and gluons, is one of the major challenges of hadron physics. Two main types of non-perturbative techniques have been developed to tackle this challenge, discretised ones using large computer simulations, and continuum ones relying on Dyson-Schwinger equations. The latter predict that the interactions between quarks generate dynamical diquarks. Using these dynamical diquarks, it has been possible to compute the Parton Distributions Amplitudes (PDA) of the nucleon and the Roper resonance. These PDAs tell how the momentum along the light cone is distributed among the valence quarks. I will present and explain the results of this work and show how we can get experimental insights of these PDAs.
Argonne Physics Division Seminar Schedule