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arXiv · 2501.06849

Systematic uncertainties from higher-twist corrections in DIS at large x

Matteo Cerutti·Alberto Accardi·Ishara P. Fernando·Shujie Li·Joseph F. Owens·Sanghwa Park
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Abstract

We investigate the systematic uncertainties and potential biases arising from the inclusion of large-$x$ corrections to proton and deuteron deep inelastic scattering (DIS) data in global quantum chromodynamics (QCD) analyses. Using the CTEQ-JLab framework, we examine various approaches to implementing higher-twist corrections in nucleon structure functions and off-shell PDF modifications in deuteron targets. We analyze how these components interact and influence the determination of the $d$-quark PDF and the neutron structure function at large $x$. We find that it is very important to consider isospin-dependent higher-twist corrections in order to minimize implementation biases in the extracted quantities.

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Matteo Cerutti, Alberto Accardi, Ishara P. Fernando, Shujie Li, Joseph F. Owens, Sanghwa Park. 2025-05-14. Systematic uncertainties from higher-twist corrections in DIS at large x. https://doi.org/10.1103/physrevd.111.094013

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