The road less travelled: parton showers at NNLL

by Ludovic Scyboz (University of Oxford), Ludovic Scyboz

Monday Sep 23, 2024, 2:00 PM → 4:00 PM Europe/Zurich

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

In recent years we have seen a dramatic improvement in the theoretical understanding of parton showers, the core component of Monte Carlo event generators, with the advent of the first next-to-leading-logarithmic (NLL) accurate programs. In this talk I review two recent developments that go beyond the state-of-the-art NLL accuracy in the context of the PanScales final-state parton showers. The first is the inclusion of the correct double-soft emission pattern in the PanGlobal shower, which brings higher accuracy for observables sensitive to soft radiation, such as the energy in a slice. The second is a connection to higher-order ingredients from analytic resummation: this latest development allows the shower to resum event shapes at NNLL, and paves the way for an increasingly robust description of observables of phenomenological relevance.