Parton Showers and Resummation 2025

Session

Recent developments in Monte Carlo generators

15 Jul 2025, 16:00

500/1-001 - Main Auditorium (CERN)

23. Decomposition of QCD splitting functions into scalar radiators and pure remainders

Max Knobbe (University of Göttingen)

15/07/2025, 16:00

In this talk, I will present a new decomposition of QCD splitting functions, carried out systematically up to second order in the strong coupling. The core idea is to separate the splitting functions into two components: scalar dipole radiator functions and pure remainders. Unlike conventional approaches, our construction does not rely on any soft or collinear approximations. The splitting...

17. A novel algorithm for spin correlations in parton evolution

Diana Mareen Hoppe (Technische Universitaet Dresden (DE))

15/07/2025, 16:30

Spin correlations between QCD emissions have so far been neglected in most of the parton shower algorithms commonly used for LHC predictions. However, their inclusion is crucial to achieve NLL accuracy or to include NLO contributions in these algorithms.
In this talk, we present a new algorithm for incorporating spin correlations into parton shower algorithms. Instead of using spin density...

54. Parton shower recoil with jets

Jack Helliwell (Monash University (AU))

15/07/2025, 17:00

3. Towards two-loop EW corrections at NLL in OpenLoops

Lorenzo Mai (University of Genova)

15/07/2025, 17:30

At energies above the Electroweak (EW) scale, higher-order EW corrections exhibit a logarithmic enhancement which is driven by the ratio of the typical scattering energy to the gauge-boson mass. At next-to-leading order (NLO) these corrections lead to factors amounting to several tens of percent in tails of kinematic distributions of crucial LHC processes, and still contribute a few percent at...