QCD@LHC2022

Session

Parallel B - WG2: 1

B

28 Nov 2022, 14:00

Auditorium Joliot Curie (Building 100)

18. Bottom pair production at next-to-next-to-leading order matched to parton shower

Mr Alessandro Ratti (Max Planck Institute for Physics)

28/11/2022, 14:00

WG2: Event Simulations and Monte Carlo Tools

We present new high precision predictions for bottom-quark pair production in hadronic collisions. These results are obtained through the implementation of a Monte Carlo event generator in the Powheg-Box framework, where the MiNNLOps method has been applied to match the next-to-next-to-leading order (NNLO) calculation to parton showers. Distributions inclusive over QCD radiation are NNLO...

148. Tuning of generators

Markus Seidel (Riga Technical University (LV))

28/11/2022, 14:20

WG2: Event Simulations and Monte Carlo Tools

Tuning of generators by the LHC experiments is presented.

20. Towards an NLC-accurate efficient matrix-element generator

Timea Vitos

28/11/2022, 14:40

WG2: Event Simulations and Monte Carlo Tools

In the colour decomposition approach to treating the SU(3) colour gauge group in automated event generators, the size of the colour matrix grows factorially with the number of external particles in the process. As such, the treatment of the colour degrees of freedom becomes the bottleneck for high-multiplicity QCD processes. We propose to utilize the large-$N_C$ expansion to obtain a sparse...

14. Chirality flow and how it can speed up amplitude calculations

Andrew Lifson

28/11/2022, 15:00

WG2: Event Simulations and Monte Carlo Tools

Two years ago, we introduced a new method for calculating Feynman diagrams more efficiently and transparently, the chirality-flow formalism. In this framework, which builds on the spinor-helicity formalism and is inspired by QCD colour flow, analytic tree-level Standard Model Feynman diagrams can be written down almost immediately as complex numbers, without the need for intermediate algebra....