Four-Loop Insights into Soft and Jet Functions in QCD

by Sven-Olaf Moch (Hamburg University (DE))

Monday 30 Mar 2026, 13:00 → 14:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Accurate description of soft and collinear radiation is fundamental for precise theoretical predictions in high-energy quantum chromodynamics (QCD). These kinematic regimes dominate many collider processes, requiring sophisticated resummation techniques and factorization theorems involving universal soft and jet functions. Leveraging recent advances in the calculation of four-loop anomalous dimensions for quarks and gluons, as well as lower-order results, we present explicit four-loop computations of the quark and gluon soft and jet functions. These results are essential components for improving the N-jettiness subtraction method and achieving next-to-next-to-next-to-next-to-leading order (N4LO) accuracy in cross-section calculations. This progress paves the way for high-precision QCD predictions and detailed phenomenological analyses relevant for current and future collider experiments.