Speaker
Tongzhi Yang
(University of Zurich)
Description
Splitting functions, often referred to as the DGLAP evolution kernel, control the scale evolution of parton distribution functions. A highly effective approach for computing these splitting functions involves the use of off-shell operator matrix elements. Nonetheless, complications arise in the singlet sector, where physical operators become entangled with non-physical ones, giving rise to intricate challenges in the process of renormalization.
In this presentation, we systematically tackle these renormalization issues and share our most recent findings concerning specific color structures for four-loop splitting functions in Quantum Chromodynamics (QCD).
Primary author
Tongzhi Yang
(University of Zurich)
Co-authors
Prof.
Andreas von Manteuffel
(Universitaet Regensburg)
Thomas Gehrmann
(University of Zurich)
Vasily Sotnikov
(University of Zurich)
