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Title: Indication on the process-dependence of the Sivers effect

Abstract

We analyze 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.

Authors:
 [1];  [2];  [3]
  1. Penn State U., JLAB
  2. LANL
  3. JLAB
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1082433
Report Number(s):
JLAB-THY-13-1691; DOE/OR/23177-2484; arXiv:1302.3218
Journal ID: 0031-9007
DOE Contract Number:  
AC05-06OR23177; FG02-07ER41460; AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Phys. Rev. Lett.
Additional Journal Information:
Journal Volume: 110; Journal Issue: 23
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Gamberg, Leonard Paul, Kang, Zhongbo, and Prokudin, Alexei. Indication on the process-dependence of the Sivers effect. United States: N. p., 2013. Web. doi:10.1103/PhysRevLett.110.232301.
Gamberg, Leonard Paul, Kang, Zhongbo, & Prokudin, Alexei. Indication on the process-dependence of the Sivers effect. United States. doi:10.1103/PhysRevLett.110.232301.
Gamberg, Leonard Paul, Kang, Zhongbo, and Prokudin, Alexei. Sat . "Indication on the process-dependence of the Sivers effect". United States. doi:10.1103/PhysRevLett.110.232301.
@article{osti_1082433,
title = {Indication on the process-dependence of the Sivers effect},
author = {Gamberg, Leonard Paul and Kang, Zhongbo and Prokudin, Alexei},
abstractNote = {We analyze 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.},
doi = {10.1103/PhysRevLett.110.232301},
journal = {Phys. Rev. Lett.},
number = 23,
volume = 110,
place = {United States},
year = {2013},
month = {6}
}