Quark-Hadron Duality in Neutron Spin-Structure and g_2 moments at intermediate Q**2

TL;DR

This paper reports on Jefferson Lab measurements of neutron and helium-3 spin structure functions in the resonance region, testing quark-hadron duality and exploring higher twist effects at intermediate Q^2 values.

Contribution

It provides new experimental data on g_1, g_2, and related moments for helium-3 and neutron, testing duality and sum rules in the resonance region.

Findings

Evidence supporting quark-hadron duality in g_1 and A_1 for He-3 and neutron.

Preliminary results on g_2 and Burkhardt-Cottingham sum rule.

Insights into higher twist contributions through the d_2 moment.

Abstract

Jefferson Lab experiment E01-012 measured the He-3 spin-structure functions and virtual photon asymmetries in the resonance region in the momentum transfer range 1.0<Q**2<4.0(GeV/c)**2. Our data, when compared with existing deep inelastic scattering data, were used to test quark-hadron duality in g_1 and A_1 for He-3 and the neutron. In addition, preliminary results on the He-3 spin-structure function g_2, on the Burkhardt-Cottingham sum rule and on higher twist effects through the x**2-weighted moment d_2 of the neutron were presented.