A study of the nuclear and kinematic dependence of R = σLT in deep inelastic electron scattering

S. Dasu*, P. de Barbaro, R. C. Walker, L. W. Whitlow, J. Alster, R. Arnold, P. Bosted, D. Benton, A. Bodek, J. Button-Shafer, G. de Chambrier, L. Clogher, B. Debfbe, F. Dietrich, B. Filippone, R. Gearhart, H. Harada, R. Hicks, J. Jourdan, M. W. KrasnyK. Lang, A. Lung, R. Milner, R. Mckeown, A. Para, D. Potterveld, E. M. Riordan, S. E. Rock, Z. M. Szalata, K. Van Bibber

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We report preliminary results on the nuclear dependence of R = σLT in the deep inelastic electron scattering from deuterium, iron, and gold nuclei. In the x, Q2 range of 0.2 ≤ x ≤ 0.5 and 1 ≤ Q2 ≤ 5 (GeV/c)2, the average RFe - RD is 0.03 ± 0.02 (stat) ± 0.06 (syst); the final systematic errors are expected to be reduced to ± 0.03. The results indicate that there are no significant spin-0 constituents or higher twist effects in nuclei as compared to free nucleons. Models for the EMC effect with significant nuclear dependence of R are ruled out. The discrepancy, at low x, between CERN and SLAC results for the cross section ratio σFeD cannot be attributed to a nuclear dependence of R as suggested by some authors. The kinematic variation of RD with x and Q2 in the SLAC energy is in agreement with the predictions of QCD with the addition of target mass effects.

Original languageEnglish
Pages (from-to)391-396
Number of pages6
JournalNuclear Physics A
Issue numberC
StatePublished - 1988


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