Higher Twist Contributions to Deep-Inelastic Structure Functions

TL;DR

This paper analyzes higher twist effects in deep-inelastic scattering, showing their size decreases with higher order QCD corrections, highlighting the importance of precision in theoretical modeling.

Contribution

It provides a detailed extraction of higher twist contributions in the large x region and examines their dependence on the order of perturbative corrections.

Findings

Higher twist contributions decrease from NLO to N^4LO.

Higher twist size correlates with the order of leading twist corrections.

Large x region shows significant higher twist effects.

Abstract

We report on a recent extraction of the higher twist contributions to the deep inelastic structure functions $F_2^{ep,ed}(x,Q^2)$ in the large $x$ region. It is shown that the size of the extracted higher twist contributions is strongly correlated with the higher order corrections applied to the leading twist part. A gradual lowering of the higher twist contributions going from NLO to N$^4$LO is observed, where in the latter case only the leading large $x$ terms were considered.