TL;DR
This paper reviews subleading QCD effects like target mass, higher-twist, and nuclear corrections, crucial for accurate global fits of parton distribution functions at large x and low Q^2, impacting collider physics.
Contribution
It presents the CTEQ6X global fit incorporating these subleading effects and discusses their implications for nucleon structure and collider experiments.
Findings
Target mass and higher-twist corrections are significant at large x and low Q^2.
Nuclear corrections are essential for deuterium data accuracy.
Impacts on quark-hadron duality and collider physics are discussed.
Abstract
I discuss several corrections to leading twist calculations of nucleon structure functions which are needed to include experimental data at large parton fractional momentum x and at low scales Q^2 in global fits of parton distribution functions. In particular I discuss the results of the CTEQ6X global fit, and some work in progress. Topics covered include the interplay of target mass and higher-twist corrections, the importance of nuclear corrections for deuterium target data, and applications to the study of quark-hadron duality. Implications for collider physics are highlighted.
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