# PSR21 - Parton Showers and Resummation

25-27 May 2021
Europe/Zurich timezone

## Non-global Logarithms Beyond Leading Colour

Not scheduled
45m
Talk

### Speaker

Chang Wu (University of Göttingen / Technion)

### Description

High-precision all-order calculations can only be performed for a narrow class of observables, which are sensitive to radiation over the entire final state phase-space. When phase-space boundaries are introduced, the resummation is affected by so-called non-global logarithms, which have an intricate all-order structure. In this talk, we present a first-principle calculation for the leading-order non-global logarithms in large-$N_c$ limit, and some improvements for higher-order and resummed results are proposed with artificial neural networks, which can dramatically speed up needed theory calculations. And the impact of the finite-$N_c$ corrections is discussed in the end.

### Primary authors

Chang Wu (University of Göttingen / Technion) Dr Simone Marzani (Università di Genova and INFN Genova) Michael Spannowsky (IPPP Durham) Marco Bellagente (Universität Heidelberg)

### Presentation materials

There are no materials yet.