Global analysis of the Sivers functions at NLO+NNLL in QCD

A bstract We perform global fit to the quark Sivers function within transverse momentum dependent (TMD) factorization formalism in QCD. simultaneously asymmetry data from Semi-Inclusive Deep Inelastic Scattering (SIDIS) at COMPASS, HERMES, and JLab, Drell-Yan lepton pair production W/Z boson RHIC. This extraction is performed next-to-leading order (NLO) next-to-next-to leading logarithmic (NNLL) accuracy. find excellent agreement between our extracted experimental for SIDIS production, while tension arises when trying describe spin asymmetries of bosons carefully assess situation, we study details impact RHIC their implications through different ways performing fit. In addition, that quality description vector could be strongly sensitive DGLAP evolution Qiu-Sterman function, besides usual TMD evolution. present discussion on this measurements transverse-spin future Electron Ion Collider.