Measurement of Double Spin Asymmetry ALT in Semi-Inclusive Pion Electroproduction on a Transversely Polarized 3He Target
We recently measured the neutron double spin asymmetry $$\mathcal{A}_{LT}$$ in the semi-inclusive deep inelastic $$^{3}He^{\uparrow}(\overrightarrow{e},e'\pi^{+/-})X$$ reactions with polarized electron beam and a transversely polarized $^3$He target. The measurement was performed in Jefferson Lab Hall A, using 6 GeV polarized electron beam scattering on a 40 cm polarized $^3$He target. The produced pions were detected in the left high- resolution spectrometer in coincidence with the scattered electrons detected by the BigBite spectrometer. The kinematic coverage focused on the valence quark region, $$x = 0.13 \sim 0.41$$, at $$Q^2=1.31 \sim 3.10~(\mathrm{GeV}/c)^2$$. This data, when combined with the world data, will provide constraints on the $$g^{q}_{1T}$$ distribution functions, which describes longitudinal polarization of quarks in the transversely polarized target, for both $$u$$-quark and $$d$$- quark in the valence region. Experiment setup and preliminary data analysis progress will be presented in this talk.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1999633
- Report Number(s):
- JLAB-PHY-09-966; DOE/OR/23177-0839
- Resource Relation:
- Conference: 2009 APS April Meeting, May 2–5, 2009; Denver, Colorado
- Country of Publication:
- United States
- Language:
- English
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A measurement of double spin asymmetry A{sub LT} in semi-inclusive pion electroproduction on a transversely polarized {sup 3}He target
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