Electroweak radiative corrections in precision LHC measurements of W±/Z0+jets

Darvishi, Neda; Masouminia, M. R.

doi:10.1016/j.nuclphysb.2022.116025

Cited by 3 publications

(1 citation statement)

References 65 publications

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“…This has been implemented in approximate form in a number of event generators [916,917]. Recently, a complete angular ordered electroweak parton shower has become available in HERWIG 7 [217,918]. The VINCIA parton shower also includes a full-fledged electroweak shower that models all possible collinear branchings in the Standard Model [223,839].…”

Section: Electroweak Evolutionmentioning

confidence: 99%

Event generators for high-energy physics experiments

Campbell,

Diefenthaler,

Hobbs

et al. 2024

SciPost Phys.

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We provide an overview of the status of Monte-Carlo event generators for high-energy particle physics. Guided by the experimental needs and requirements, we highlight areas of active development, and opportunities for future improvements. Particular emphasis is given to physics models and algorithms that are employed across a variety of experiments. These common themes in event generator development lead to a more comprehensive understanding of physics at the highest energies and intensities, and allow models to be tested against a wealth of data that have been accumulated over the past decades. A cohesive approach to event generator development will allow these models to be further improved and systematic uncertainties to be reduced, directly contributing to future experimental success. Event generators are part of a much larger ecosystem of computational tools. They typically involve a number of unknown model parameters that must be tuned to experimental data, while maintaining the integrity of the underlying physics models. Making both these data, and the analyses with which they have been obtained accessible to future users is an essential aspect of open science and data preservation. It ensures the consistency of physics models across a variety of experiments.

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Section: Electroweak Evolutionmentioning

confidence: 99%

Event generators for high-energy physics experiments

Campbell,

Diefenthaler,

Hobbs

et al. 2024

SciPost Phys.

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Hadronization and decay of excited heavy hadrons in Herwig 7

Masouminia,

Richardson

2024

J. High Energ. Phys.

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We revisit the hadronization and decay of excited heavy mesons and heavy baryons in Herwig 7 general-purpose event-generator, following four distinct steps: (i) Passing through the polarisation of heavy hadrons at the end of parton shower through the application of heavy quark effective theory (HQET), where the emergence of a spin-flavour symmetry allows for the determination of the polarisations of the excited heavy mesons and heavy baryons from the helicity states of the light and heavy quarks. (ii) Improving the strong and radiative decay modes of the excited heavy mesons, where in the absence of conclusive experimental data on many of the decays, one needs to rely on HQET symmetries to determine the favoured decay modes, widths and branching ratios. (iii) Re-examination of the production rates of heavy hadrons using all available experimental data sources and (iv) performing a general tune for Herwig’s free parameters to reflect the implemented changes. We compare our predictions against existing experimental data in the presence/absence of the newly implemented updates. These improvements will be available with Herwig-7.3.0 public release.

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Herwig 7.3 release note

Bewick,

Ferrario Ravasio,

Gieseke

et al. 2024

Eur. Phys. J. C

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A new release of the Monte Carlo event generator (version 7.3) has been launched. This iteration encompasses several enhancements over its predecessor, version 7.2. Noteworthy upgrades include: the implementation of a process-independent electroweak angular-ordered parton shower integrated with QCD and QED radiation; a new recoil scheme for initial-state radiation improving the behaviour of the angular-ordered parton shower; the incorporation of the heavy quark effective theory to refine the hadronization and decay of excited heavy mesons and heavy baryons; a dynamic strategy to regulate the kinematic threshold of cluster splittings within the cluster hadronization model; several improvements to the structure of the cluster hadronization model allowing for refined models; the possibility to extract event-by-event hadronization corrections in a well-defined way; the possibility of using the string model, with a dedicated tune. Additionally, a new tuning of the parton shower and hadronization parameters has been executed. This article discusses the novel features introduced in version 7.3.0.

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Electroweak radiative corrections in precision LHC measurements of W±/Z0+jets

Cited by 3 publications

References 65 publications

Event generators for high-energy physics experiments

Event generators for high-energy physics experiments

Hadronization and decay of excited heavy hadrons in Herwig 7

Herwig 7.3 release note

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