Process Dependence and the Sivers Effect in Inclusive and Semi-Inclusive Reactions
- Penn State University, University Park, PA (United States)
- LANL, Los Alamos, NM (United States)
- JLAB, Newport News, VA (United States)
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1116344
- Report Number(s):
- JLAB-THY-13-1793; DOE/OR-23177-2977; TRN: US1400156
- Journal Information:
- International Journal of Modern Physics: Conference Series, Vol. 25; Conference: QCD Evolution 2013, Newport News, VA (United States), 6-10 May 2013; ISSN 2010-1945
- Publisher:
- World Scientific
- Country of Publication:
- United States
- Language:
- English
Similar Records
Indications of process dependence and the Sivers effect
Extracting the Sivers function from polarized semi-inclusive deep inelastic scattering data and making predictions