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Parton Showers beyond Leading Logarithmic Accuracy
Parton showers are among the most widely used tools in collider physics. Despite their key importance, none so far have been able to demonstrate accuracy beyond a basic level known as leading logarithmic order, with ensuing limitations across a broad spectrum of physics applications. In this Letter,...
Autores principales: | , , , , , |
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Lenguaje: | eng |
Publicado: |
2020
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.125.052002 http://cds.cern.ch/record/2711623 |
_version_ | 1780965250090139648 |
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author | Dasgupta, Mrinal Dreyer, Frédéric A. Hamilton, Keith Monni, Pier Francesco Salam, Gavin P. Soyez, Gregory |
author_facet | Dasgupta, Mrinal Dreyer, Frédéric A. Hamilton, Keith Monni, Pier Francesco Salam, Gavin P. Soyez, Gregory |
author_sort | Dasgupta, Mrinal |
collection | CERN |
description | Parton showers are among the most widely used tools in collider physics. Despite their key importance, none so far have been able to demonstrate accuracy beyond a basic level known as leading logarithmic order, with ensuing limitations across a broad spectrum of physics applications. In this Letter, we propose criteria for showers to be considered next-to-leading logarithmic accurate. We then introduce new classes of shower, for final-state radiation, that satisfy the main elements of these criteria in the widely used large-NC limit. As a proof of concept, we demonstrate these showers’ agreement with all-order analytical next-to-leading logarithmic calculations for a range of observables, something never so far achieved for any parton shower. |
id | cern-2711623 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27116232022-10-12T02:05:22Zdoi:10.1103/PhysRevLett.125.052002http://cds.cern.ch/record/2711623engDasgupta, MrinalDreyer, Frédéric A.Hamilton, KeithMonni, Pier FrancescoSalam, Gavin P.Soyez, GregoryParton Showers beyond Leading Logarithmic Accuracyhep-phParticle Physics - PhenomenologyParton showers are among the most widely used tools in collider physics. Despite their key importance, none so far have been able to demonstrate accuracy beyond a basic level known as leading logarithmic order, with ensuing limitations across a broad spectrum of physics applications. In this Letter, we propose criteria for showers to be considered next-to-leading logarithmic accurate. We then introduce new classes of shower, for final-state radiation, that satisfy the main elements of these criteria in the widely used large-NC limit. As a proof of concept, we demonstrate these showers’ agreement with all-order analytical next-to-leading logarithmic calculations for a range of observables, something never so far achieved for any parton shower.Parton showers are among the most widely used tools in collider physics. Despite their key importance, none so far has been able to demonstrate accuracy beyond a basic level known as leading logarithmic (LL) order, with ensuing limitations across a broad spectrum of physics applications. In this letter, we propose criteria for showers to be considered next-to-leading logarithmic (NLL) accurate. We then introduce new classes of shower, for final-state radiation, that satisfy the main elements of these criteria in the widely used large-$N_C$ limit. As a proof of concept, we demonstrate these showers' agreement with all-order analytical NLL calculations for a range of observables, something never so far achieved for any parton shower.arXiv:2002.11114CERN-TH-2020-026oai:cds.cern.ch:27116232020-02-25 |
spellingShingle | hep-ph Particle Physics - Phenomenology Dasgupta, Mrinal Dreyer, Frédéric A. Hamilton, Keith Monni, Pier Francesco Salam, Gavin P. Soyez, Gregory Parton Showers beyond Leading Logarithmic Accuracy |
title | Parton Showers beyond Leading Logarithmic Accuracy |
title_full | Parton Showers beyond Leading Logarithmic Accuracy |
title_fullStr | Parton Showers beyond Leading Logarithmic Accuracy |
title_full_unstemmed | Parton Showers beyond Leading Logarithmic Accuracy |
title_short | Parton Showers beyond Leading Logarithmic Accuracy |
title_sort | parton showers beyond leading logarithmic accuracy |
topic | hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1103/PhysRevLett.125.052002 http://cds.cern.ch/record/2711623 |
work_keys_str_mv | AT dasguptamrinal partonshowersbeyondleadinglogarithmicaccuracy AT dreyerfrederica partonshowersbeyondleadinglogarithmicaccuracy AT hamiltonkeith partonshowersbeyondleadinglogarithmicaccuracy AT monnipierfrancesco partonshowersbeyondleadinglogarithmicaccuracy AT salamgavinp partonshowersbeyondleadinglogarithmicaccuracy AT soyezgregory partonshowersbeyondleadinglogarithmicaccuracy |