Global fit finds u and d PDFs stable to x≈0.8 with positive isospin-independent higher-twist corrections and nonzero off-shell nucleon contributions required to describe nuclear data.
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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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Stability of parton distributions at high $x$: impact of nuclear and power corrections
Global fit finds u and d PDFs stable to x≈0.8 with positive isospin-independent higher-twist corrections and nonzero off-shell nucleon contributions required to describe nuclear data.
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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.