The Q{sup 2}-Dependence of the Neutron Spin Structure Function g{sub 2}{sup n} at Low Q{sup 2}

We present the first measurement of the Q{sup 2} dependence of the neutron spin structure function g{sub 2}{sup n} at five kinematic points covering 0.57 (GeV/c){sup 2}{<=}Q{sup 2}{<=}1.34 (GeV/c){sup 2} at x{approx_equal}0.2. Though the naive quark-parton model predicts g{sub 2}=0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g{sub 2}{sup n} can be predicted using next-to-leading order fits to world data for g{sub 1}{sup n}. Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q{sup 2}, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g{sub 1}{sup n} are consistent with next-to-leading order fits to world data.