Pion Structure in the Covariant Parton Model

We present a theoretical introduction to parton distribution functions (PDFs) and other related distributions used to model the internal structures of subatomic particles on an elementary scale. We also introduce the so-called covariant parton model (CPM) and explain how to use the model to calculate the distributions of interest. Using data from the HERA collider with JAM parametrization, we perform these calculations for pions in the CPM. By providing an outlook on our CPM project, we aim to provide theoretical background to experimental and lattice QCD calculations.