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Title: Process Dependence and the Sivers Effect in Inclusive and Semi-Inclusive Reactions

We perform an analysis of the the spin asymmetry for single inclusive jet production in proton-proton collisions collected by AnDY experiment and the Sivers asymmetry data from semi-inclusive deep inelastic scattering experiments. In particular, we consider the role color gauge invariance plays in determining the process-dependence of the Sivers effect. We find that 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 also make predictions for both direct photon and Drell-Yan spin asymmetry, to further test the process-dependence of the Sivers effect in future experiments.
 [1] ;  [2] ;  [3]
  1. Penn State University, University Park, PA (United States)
  2. LANL, Los Alamos, NM (United States)
  3. JLAB, Newport News, VA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-THY--13-1793; DOE/OR--23177-2977
Journal ID: ISSN 2010-1945; TRN: US1400156
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: International Journal of Modern Physics: Conference Series; Journal Volume: 25; Conference: QCD Evolution 2013, Newport News, VA (United States), 6-10 May 2013
World Scientific
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC) (United States)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Deep Inelastic Scattering; QCD; Parton Model