Speaker
Tim Holmstrom
(Longwood University)
Description
An experiment (E07--013) to measure the target normal single spin asymmetry A^n_N in inclusive deep-inelastic n^{\uparrow}(e,e') reaction with a vertically polarized 3He target has completed data collection during Jefferson Lab's Hall A neutron transversity experiment (E06--010). The expected accuracy of this measurement is delta A^n_N = 3 x 10^{-3}. There are no previous measurements of this asymmetry on the neutron. The target normal spin asymmetry in DIS probes helicity--flip amplitudes at the quark level that are related to effects beyond the leading-twist picture of DIS. In view of the predicted rapid variation of the asymmetry between 10^{-2} (exclusive) and 10^{-4} (DIS-inclusive), a non-zero measurement would be sensitive to the transition from hadronic to partonic degrees of freedom. The status and perspectives of the data analysis will be discussed.
