World data on isoscalar DIS cross-section ratios exhibit near-perfect cancellation of nuclear effects in the valence region 0.25 ≤ x ≤ 0.35 across nuclei.
Measurement of the EMC Effect in the Deuteron
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abstract
We have determined the structure function ratio $R^d_{\rm EMC}=F_2^d/(F_2^n+F_2^p)$ from recently published $F_2^n/F_2^d$ data taken by the BONuS experiment using CLAS at Jefferson Lab. This ratio deviates from unity, with a slope $dR_{\rm EMC}^{d}/dx= -0.10\pm 0.05$ in the range of Bjorken $x$ from 0.35 to 0.7, for invariant mass $W>1.4$ GeV and $Q^2>1$ GeV$^2$. The observed EMC effect for these kinematics is consistent with conventional nuclear physics models that include off-shell corrections, as well as with empirical analyses that find the EMC effect proportional to the probability of short-range nucleon-nucleon correlations.
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The EIC Yellow Report specifies the science goals, required detector capabilities, and technology concepts needed to realize a high-luminosity electron-ion collider program.
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On the Cancellation of Nuclear Effects in the Valence Region
World data on isoscalar DIS cross-section ratios exhibit near-perfect cancellation of nuclear effects in the valence region 0.25 ≤ x ≤ 0.35 across nuclei.
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Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report
The EIC Yellow Report specifies the science goals, required detector capabilities, and technology concepts needed to realize a high-luminosity electron-ion collider program.