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198882 citationsJournal Articlebronze Open Access

Authors

Sridhara Dasu · University of Rochester

P. de Barbaro · University of Rochester

A. Bodek · University of Rochester

H. Harada · University of Rochester

M. W. Krasny · University of Rochester

K. Lang · University of Rochester

E. M. Riordan · University of Rochester

Abstract

We measured the differences in $R=\frac{{\ensuremath{\sigma}}_{L}}{{\ensuremath{\sigma}}_{T}}$ and the cross-section ratio $\frac{{\ensuremath{\sigma}}^{A}}{{\ensuremath{\sigma}}^{D}}$ in deep-inelastic electron scattering from D, Fe, and Au nuclei in the kinematic range $0.2\ensuremath{\le}x\ensuremath{\le}0.5$ and $1\ensuremath{\le}{Q}^{2}\ensuremath{\le}5$ ${(\mathrm{G}\mathrm{e}\mathrm{v}/\mathit{c})}^{2}$. Our results for ${R}^{A}\ensuremath{-}{R}^{D}$ are consistent with zero for all $x$ and ${Q}^{2}$, indicating that possible contributions to $R$ from nuclear higher-twist effects and spin-0 constituents in nuclei are not different from those in nucleons. The European Muon Collaboration effect is reconfirmed, and the low-$x$ data from all recent experiments, at all ${Q}^{2}$, are now in agreement.

Topics & Keywords

Quantum Chromodynamics and Particle Interactions Particle physics theoretical and experimental studies Advanced NMR Techniques and Applications

Publication Details

Published in: Physical Review Letters

Volume 60, Issue 25, pp. 2591-2594

DOI: 10.1103/physrevlett.60.2591

Field-Weighted Citation Impact: 9.21

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