Building and testing accurate parton showers

Tuesday, 14 December 2021 at 11:15

Parton showers are at the core of general-purpose Monte Carlo event generators. As an introduction, I will review how the simulation of partonic cascades can be obtained through dipole showers, discuss how to quantify their accuracy. For the second part of the talk, I will introduce a set of criteria required to achieve single-logarithmic accuracy. I will then show that standard dipole showers fail to satisfy these requirements and introduce two "PanScales" showers fixing these issues. I will then show how shower accuracy can be tested numerically. In the last part of the talk, I will discuss extensions of the initial PanScales showers to include subleading colour and spin corrections. Throughout the talk, I will make an effort to make connections with jet substructure techniques (in particular Lund-plane based tools).

Slides (PDF, 3 MB)