Measurement of Single Target-Spin Asymmetry in Semi-Inclusive DIS using Transversely Polarized $^3$He Target
ORAL
Abstract
We recently measured the neutron target single spin asymmetry in the semi-inclusive deep inelastic $^{3}He^{\uparrow}(e,e'\pi^{+/-})X$ reactions with a transversely polarized $^3$He target. The experiment was performed at Jefferson Lab Hall A from October 2008 to February 2009. The pions 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, $x = 0.13$ to $0.41$, at $Q^2=1.31$ to $ 3.10~(\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 $u$-quark and $d$-quark in the valence region. An update on the on-going analysis will be presented in this talk.
–
Authors
-
Kalyan Allada
University of Kentucky