We assess the current phenomenological status of transverse momentum dependent (TMD)
parton distribution functions (PDFs) and fragmentation functions (FFs) and study the effect of …

I review TMD factorization and evolution theorems, with an emphasis on the treatment by
Collins and originating in the Collins-Soper-Sterman (CSS) formalism. I summarize basic …

It has by now been established that standard QCD factorization using transverse
momentum dependent parton distribution functions fails in hadroproduction of nearly back-to-back …

We extend the Collins-Soper-Sterman (CSS) formalism to apply it to the spin dependence
governed by the Sivers function. We use it to give a correct numerical QCD evolution of …

Transverse-momentum-dependent distributions (TMDs) are extensions of collinear parton
distributions and are important in high-energy physics from both theoretical and …

In this paper, we perform the first simultaneous QCD global analysis of data from semi-inclusive
deep inelastic scattering, Drell-Yan, e+ e− annihilation into hadron pairs, and proton-…

We construct an improved implementation for combining transverse-momentum-dependent (TMD)
factorization and collinear factorization. TMD factorization is suitable for low …

Motivated by the need to correct the potentially large kinematic errors in approximations
used in the standard formulation of perturbative QCD, we reformulate deeply inelastic lepton-…

We perform a comprehensive new Monte Carlo analysis of high-energy lepton-lepton,
lepton-hadron and hadron-hadron scattering data to simultaneously determine parton distribution …

The Sivers transverse single spin asymmetry (TSSA) is calculated and compared at different
scales using the transverse-momentum-dependent (TMD) evolution equations applied to …