Measurement of the Deuteron Spin Structure Function g_1^d(x) for 1 (GeV/c)^2 < Q^2 < 40 (GeV/c)^2

TL;DR

This paper reports new high-precision measurements of the deuteron spin structure function g_1^d using polarized electron scattering on lithium deuteride, providing insights into quark polarization and nucleon spin structure.

Contribution

First high-dose electron scattering data on deuterons using lithium deuteride as target, extending the kinematic range and enabling moments and polarization analysis.

Findings

Measured g_1^d over 0.01 < x < 0.9 and 1 < Q^2 < 40 (GeV/c)^2

Calculated moments including Gamma_1^d and Delta Sigma

Provided data for understanding nucleon spin contributions

Abstract

New measurements are reported on the deuteron spin structure function g_1^d. These results were obtained from deep inelastic scattering of 48.3 GeV electrons on polarized deuterons in the kinematic range 0.01 < x < 0.9 and 1 < Q^2 < 40 (GeV/c)^2. These are the first high dose electron scattering data obtained using lithium deuteride (6Li2H) as the target material. Extrapolations of the data were performed to obtain moments of g_1^d, including Gamma_1^d, and the net quark polarization Delta Sigma.