Speaker
Dr
Alexei Prokudin
(Jefferson Lab)
Description
We consider the role process dependence in the Sivers effect
from analyzing the single transverse spin asymmetry for inclusive jet production in proton-proton collisions recently collected by AnDY experiment at RHIC, and the asymmetry data from semi-inclusive deep inelastic scattering experiments are presented. After carefully taking into account the initial-state and final-state interactions between the active parton and the remnant of the polarized hadron, the calculated jet spin asymmetry based on the Sivers functions extracted from HERMES and COMPASS experiments is consistent with the AnDY experimental data. This provides a first indication for the process-dependence of the Sivers effect in different processes. We make predictions for both direct photon and Drell-Yan spin asymmetry, to further test the process-dependence of the Sivers effect in future experiments.
Authors
Dr
Alexei Prokudin
(Jefferson Lab)
Leonard Gamberg
(Penn State University)
Dr
Zhongbo Kang
(Los Alamos National Lab)
