DIS coefficient functions at four loops in QCD and beyond

Abstract

We report results for the lowest even-$N$ moments of the flavor-nonsinglet structure functions $F_2$ and $F_L$ in QCD at the fourth order in the perturbative expansion in the strong coupling constant ${\alpha }_s$. Our results are presented in numerical form and we compare them with the leading and subleading terms of the threshold expansion for large values of $N$, which corresponds to the limit $x\to 1$.

Comments: 11 pages, LaTeX, 3 figures; Proceedings "Loops and Legs in Quantum Field Theory - LL2022"