Deep-Inelastic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>e</mml:mi><mml:mo>−</mml:mo><mml:mi>p</mml:mi></mml:math>Asymmetry Measurements and Comparison with the Bjorken Sum Rule and Models of Proton Spin Structure

Abstract

We report new measurements of the asymmetry in the deep-inelastic scattering of longitudinally polarized electrons by longitudinally polarized protons in the kinematic range $2&lt;~\ensuremath{\omega}&lt;~10$, $1&lt;~{Q}^{2}&lt;~4$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$, and $2&lt;~W&lt;~4$ GeV. We compare our results with the Bjorken sum rule and with several theoretical models of the internal spin structure of the proton.