Sivers Asymmetry with QCD Evolution

Abstract

We analyze the Sivers asymmetry in both Drell-Yan (DY) production and semi-inclusive deep inelastic scattering (SIDIS), while considering properly defined transverse momentum dependent parton distribution and fragmentation functions and their QCD evolution. After finding a universal non-perturbative spin-independent Sudakov factor that can describe reasonably well the world's data of SIDIS, DY lepton pair and $W/Z$ production in unpolarized scatterings, we perform a global fitting of all the experimental data on the Sivers asymmetry in SIDIS from HERMES, COMPASS and Jefferson Lab. Then we make predictions for the asymmetry in DY lepton pair and $W$ boson production, which could be compared to the future experimental data in order to test the sign change of the Sivers function.

9 pages, 3 figures. Proceedings of QCD Evolution 2014

References in corpus (6)

• Sivers Effect for Pion and Kaon Production in Semi-Inclusive Deep Inelastic Scattering
• QCD Evolution of the Sivers Asymmetry
• Single transverse-spin asymmetry in high transverse momentum pion production in pp collisions
• An Observation Concerning the Process Dependence of the Sivers Functions
• Test the time-reversal modified universality of the Sivers function
• Sivers asymmetry of Drell-Yan production in small-$x$ regime

Cited by in corpus (2)

• Hadrons and Nuclei
• Lattice QCD study of the Boer-Mulders effect in a pion