New results for the 4-loop massive cusp anomalous dimension

Abstract

I present new results for the massive cusp anomalous dimension at four loops in QCD. I combine partial exact and conjectured analytical expressions with an approximation that is based on the asymptotic behavior of the cusp anomalous dimension to produce the newest estimates. Detailed comparisons are made with previous approximate results that highlight the robustness of the calculational approach.

6 pages, 3 figures; presented at ICHEP 2026, 30 July - 5 August 2026, Natal, Brazil