HEP Colloquia 2024

by Jose Osvaldo Gonzalez Hernandez (Istituto Nazionale di Fisica Nucleare)

Wednesday Jul 17, 2024, 2:30 PM → 4:00 PM Europe/Rome

Sala Consiliare (Department of Physics)

Phenomenology of transverse momentum dependent functions in a hadron structure oriented approach

Transverse momentum dependent functions (TMDs) contain 3-dimensional information about the structure of hadrons in momentum space.Their usual interpretation regards them as number densities of constituent particles, partons, inside hadrons. These fundamental functions are predominantly extracted from data, which involves constructing models that serve as a proxy to map their profile, guided by some statistical analysis. Since TMDs have well defined operator definitions in QCD, they also obey certain theoretical constraints, which should be imposed in any model used for extractions. This is of the utmost importance for a meaningful interpretation of results within QCD. In this talk, I will discuss a recently proposed approach to phenomenology which emphasizes the role of theoretical constraints in modeling TMDs, as well as the predictive aspect of TMD evolution equations and perturbative QCD. I will also discuss a few practical examples and comparisons to some experimental data.