Extraction of pion transverse momentum distributions from Drell-Yan data

The pion is the simplest of all hadrons and together with the nucleon constitutes one of the most fundamental entities in the visible Universe. In the Standard Model, both particles are built as bound states of the quark and gluon degrees of freedom of quantum chromodynamics (QCD). However, in this context the pion plays a unique role since it is the Goldstone boson of chiral symmetry breaking. Therefore, it is extremely important to investigate its internal structure and understand how the latter is responsible of the macroscopic differences between the bound state of a pion and of a nucleon (see, e.g., Ref. [1] for a