New Measurements of the European Muon Collaboration Effect in Very Light Nuclei
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New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from [superscript 2]H, [superscript 3]He, [superscript 4]He, [superscript 9]Be and [superscript 12]C for 0.3<x<0.9, Q[superscript 2]≈3–6 GeV[superscript 2]. These data represent the first measurement of the EMC effect for 3He at large x and a significant improvement for 4He. The data do not support previous A-dependent or density-dependent fits to the EMC effect and suggest that the nuclear dependence of the quark distributions may depend on the local nuclear environment.
Date issued
2009-11Department
Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Seely, J. et al. “New Measurements of the European Muon Collaboration Effect in Very Light Nuclei.” Physical Review Letters 103.20 (2009): 202301. © 2009 The American Physical Society
Version: Final published version
ISSN
0031-9007