Single and Double Spin Asymmetry Measurements in Semi-Inclusive and Inclusive DIS on Polarized He-3

Conference · Fri Jun 01 04:00:00 EDT 2012

DOI:https://doi.org/10.3204/DESY-PROC-2012-02/139· OSTI ID:1079970

Sulkosky, Vincent A. ^[1]; Allada, Kalyan C. ^[2]

---

1. MIT
2. JLAB

Jefferson Lab experiment E06-010 measured the target-single spin (SSA) and double spin asymmetries (DSA) in semi-inclusive deep inelastic pion electroproduction on a transversely polarized He-3 target. The measured asymmetry (A_UT) is sensitive to the nucleon transversity and Sivers distribution functions, whereas the measured A_LT asymmetry is related to the transverse momentum dependent PDF g_1T. The kinematics were chosen to be in the valence quark region with x ~ 0.16-0.35 and Q^2 ~ 1.4-2.7 GeV^2. The Collins moment, which is sensitive to transversity, the Sivers and A_LT moments, which are sensitive to the orbital motion of the quarks, were extracted using the azimuthal angular dependence of the measured asymmetries. These data, when combined with the data from other experiments on transversely polarized proton and deuteron targets, will help in extracting the nucleon transverse momentum dependent distribution functions via a global analysis. These semi-inclusive results will be presented and discussed along with the preliminary results for the inclusive single spin asymmetries.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1079970
• Report Number(s): JLAB-PHY-12-1681; DOE/OR/23177-2567
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS