Speaker
Description
Modern investigations of hadron structure within TMD factorization require a precise determination of the Collins–Soper (CS) kernel, which governs TMD evolution and encodes nonperturbative dynamics. In this talk, I present a phenomenological analysis of the CS kernel based on recent lattice QCD calculations, aiming to assess their consistency with experimental data. A flexible fitting framework is developed within the CSS formalism to describe several lattice datasets, with particular emphasis on model dependence and the statistical quality of the fits. While different models lead to sizable variations at large transverse distances, they provide comparable descriptions of the lattice data. The extracted CS kernels are used to compute Drell–Yan cross sections and compared with experimental measurements at different energy scales.
The sensitivity of the final results to model choices is thoroughly investigated.
This analysis provides a systematic framework to validate lattice determinations and quantify their phenomenological impact.