LoopFest XXIV

Four-loop cusp anomalous dimension with heavy quarks

Not scheduled

20m

Physics Department (Bldg. 510), Large Seminar Room (Brookhaven National Laboratory)

Speaker

Prof. Nikolaos Kidonakis (Kennesaw State University)

Description

I present calculations of the cusp anomalous dimension with heavy-quark lines at four loops in QCD. I combine partial exact and conjectured analytical expressions with approximate terms that are based on the asymptotic behavior of the cusp anomalous dimension at small and large heavy-quark speeds to produce the newest estimate. Detailed comparisons are made with previous approximate results that highlight the robustness of the calculational approach.