TMDs: Evolution, modeling, precision
  The factorization theorem for $q_T$ spectra in Drell-Yan processes, boson production and semi-inclusive deep inelastic scattering allows for the determination of the non-perturbative parts of transverse momentum dependent parton distribution functions. Here we discuss the fit of Drell-Yan and $Z$-production data using the transverse momentum dependent formalism and the resummation of the evolution kernel. We find a good theoretical stability of the results and a final $\chi^2/{\rm points}\lesssim 1$. We show how the fixing of the non-perturbative pieces of the evolution can be used to make predictions at present and future colliders. 
Umberto D'Alesio (1), Miguel G. Echevarr\'ia (2), Stefano Melis (3),   and Ignazio Scimemi (4) ((1) University and INFN, Cag...
hep-ph