Measurement of Single Spin Asymmetries in Semi-Inclusive DIS reaction n↑(e,e′π+)X using Transversely Polarized 3He Target

Conference · Mon Nov 01 04:00:00 EDT 2010

OSTI ID:1997191

Allada, Kalyan

Measurement of single-spin asymmetries(SSA) on transversely polarized targets gives an access to several interesting aspects of the transverse spin structure of the nucleon. We recently measured the neutron target SSA in the semi-inclusive deep inelastic reaction, $$^{3}He^{\uparrow}(e,e'\pi^{\pm}/K^{\pm})X$$, with a transversely polarized $^3$He target. The experiment was performed at the Jefferson Lab Hall A. The produced hadrons were detected in the high-resolution spectrometer in coincidence with the scattered electrons detected by the BigBite spectrometer. The kinematic coverage focuses on the valence quark region, $x = 0.1$ to $0.4$, at $Q^2=1$ to $$3~(\mathrm{GeV}/c)^2$$. Good particle identification was achieved using a RICH detector, an aerogel Cherenkov counter and time-of-flight detectors, which allowed for clean $$\pi^{\pm}$$ and $$K^{\pm}$$ detection. The data from this experiment, when combined with the world data, will provide constraints on the transversity and Sivers distributions on both $$u$$ and $$d$$ quarks in the valence region. In this talk we will present the first results of the neutron Collins and Sivers asymmetries in $$n^{\uparrow}(e,e'\pi^+)X$$ channel and discuss its implications.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1997191
• Report Number(s): JLAB-PHY-09-1323; DOE/OR/23177-7082
• Country of Publication: United States
• Language: English