On the Interplay of Nuclear and Higher-Twist Corrections in Nuclear Structure Functions

S. I. Alekhin; S. A. Kulagin; R. Petti

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arXiv · 2410.21472

On the Interplay of Nuclear and Higher-Twist Corrections in Nuclear Structure Functions

S. I. Alekhin·S. A. Kulagin·R. Petti

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Abstract

We discuss results from our global QCD analyses including nuclear data off deuterium from various measurements, as well as off $\htri$ and $\hetri$ targets from the \mara{} experiment. We simultaneously determine the parton distribution functions of the proton, the higher-twist terms, and the nucleon off-shell correction functions responsible for the modifications of the partonic structure in bound protons and neutrons. In particular, we study the neutron-proton asymmetry of the off-shell correction and its interplay with the treatment of the higher-twist terms. We observe that the data on the $\hetri/\htri, \hetri/\hdeu$, and $\htri/\hdeu$ cross section ratio are in good agreement with the predictions based on a single isoscalar off-shell function. We provide the corresponding predictions on the ratio $F_2^n/F_2^p$, on the $d$ and $u$ quark distributions in the proton and in the $\htri$ and $\hetri$ nuclei, as well as for future measurements of the EMC effect with parity-violating Deep Inelastic Scattering (DIS).

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S. I. Alekhin, S. A. Kulagin, R. Petti. 2024-10-28. On the Interplay of Nuclear and Higher-Twist Corrections in Nuclear Structure Functions. https://arxiv.org/abs/2410.21472

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