Determination of the Collins-Soper kernel from cross-sections ratios

The Collins-Soper kernel is a powerful tool for studying the properties of QCD vacuum and an essential component transverse momentum dependent (TMD) factorization theorem. In this paper, we present novel method determining directly from comparison differential cross sections measured at different energies. relies solely on structure TMD theorem thus also provides direct test validity. With minor modifications, procedure can be applied to real data Drell-Yan SIDIS processes. As demonstration, analyze pseudodata generated by CASCADE event generator determine suggested parton branching model.