Extraction of the Sivers Function from SIDIS, Drell-Yan, and W±/Z Data at Next-to-Next-to-Next-to Leading Order

We perform the global analysis of polarized semi-inclusive deep inelastic scattering (SIDIS), pion-induced polarized Drell-Yan (DY) process, and W-+/-/Z boson production data and extract the Sivers function for u, d, s and for sea quarks. We use the framework of transverse momentum dependent factorization at next-to-next-to-next-to leading order ((NLO)-L-3) accuracy. The Qiu-Sterman function is determined in a model independent way from the extracted Sivers function. We also evaluate the significance of the predicted sign change of the Sivers function in DY process with respect to SIDIS.

Automated summary

The study conducted global analysis, extracted Sivers functions for u, d, s and sea quarks, and evaluated the significance of the predicted sign change of the Sivers function in different processes.