3He Spin-Dependent Cross Sections and Sum Rules

TL;DR

This paper reports measurements of spin-dependent cross sections for polarized helium-3, evaluates sum rules, and compares experimental data with theoretical calculations in the quasielastic region.

Contribution

First experimental evaluation of nuclear Burkhardt--Cottingham and extended GDH sum rules for helium-3 using spin-dependent cross sections.

Findings

Data agrees with Faddeev calculations in quasielastic region.

Sum rules are evaluated for the first time for helium-3.

Insights into nuclear spin structure at low Q^2.

Abstract

We present a measurement of the spin-dependent cross sections for the \vec{^3He}(\vec{e},e')X} reaction in the quasielastic and resonance regions at four-momentum transfer 0.1 < Q^2< 0.9 GeV^2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt--Cottingham and extended GDH sum rules for the first time. Impulse approximation and exact three-body Faddeev calculations are also compared to the data in the quasielastic region.