Factorization of Non-Global LHC Observables and Resummation of Super-Leading Logarithms

Thomas Becher (U Bern)

Aug 14. 2023, 11:30 — 12:30

We present a factorization theorem for non-global observables at hadron colliders, such as gap-between-jets cross sections. The theorem factorizes cross sections into hard functions and low-energy matrix elements, which obey a renormalization group evolution equation. We detail the derivation of the associated anomalous dimension at one loop and show how it can be used to resum the leading double-logarithmic contributions to these cross sections to all orders, thereby solving the long-standing problem of all-order resummation for these so-called "super-leading logarithms". We also explain why the super-leading effects are sizable for pp→2 jets processes but suppressed in H/Z and H/Z+jet production.


Further Information
ESI Schrödinger Lecture Hall
Associated Event:
Quantum Field Theory at the Frontiers of the Strong Interaction (Thematic Programme)
André H. Hoang (U of Vienna)
Simon Plätzer (U of Graz)
Massimiliano Procura (U of Vienna)
Malin Sjödahl (Lund U)
Iain Stewart (MIT, Cambridge)