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A Study of QCD Radiation in VBF Higgs Production with Vincia and Pythia

by Stefan Höche, Stephen Mrenna, Shay Payne, Christian T Preuss, Peter Skands

This Submission thread is now published as SciPost Phys. 12, 010 (2022)

Submission summary

As Contributors: Christian Tobias Preuss
Preprint link: scipost_202106_00039v3
Date accepted: 2021-10-28
Date submitted: 2021-10-13 11:03
Submitted by: Preuss, Christian Tobias
Submitted to: SciPost Physics
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approaches: Computational, Phenomenological


We discuss and illustrate the properties of several parton-shower algorithms available in Pythia and Vincia, in the context of Higgs production via vector boson fusion (VBF). In particular, the distinctive colour topology of VBF processes allows to define observables sensitive to the coherent radiation pattern of additional jets. We study a set of such observables, using the Vincia sector-antenna shower as our main reference, and contrast it to Pythia's transverse-momentum-ordered DGLAP shower as well as Pythia's dipole-improved shower. We then investigate the robustness of these predictions as successive levels of higher-order perturbative matrix elements are incorporated, including next-to-leading-order matched and tree-level merged calculations, using Powheg Box and Sherpa respectively to generate the hard events.

Published as SciPost Phys. 12, 010 (2022)

List of changes

1. Replaced the term "parton-shower model" by "parton-shower algorithm" throughout.
2. Replaced the phrase "amount of coherent radiation" in the introduction by "amount of radiation".

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