The soft-gluon limit and the infrared enhancement of the quark-gluon vertex

Detalhes bibliográficos
Autor(a) principal: Oliveira, Orlando
Data de Publicação: 2020
Outros Autores: Frederico, Tobias, de Paula, Wayne
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/106065
https://doi.org/10.1140/epjc/s10052-020-8037-0
Resumo: The Schwinger–Dyson quark equation (SDE) combined with results from lattice simulation for the propagators are used to obtain information on the quark-gluon vertex, taking into account the recent full QCD lattice results for the soft-gluon limit. Its inclusion leads to a clear enhancement of the infrared quark-gluon vertex.We also find that the relative contribution of the quark-ghost kernel to the quarkgluon vertex in the infrared region does not follow the rules from the perturbative analysis of the ultraviolet region. This shows that forQCDthe intuition based on perturbation theory does not apply to the full momentum range. The framework developed in the current work provides analytical expressions for all the longitudinal components of vertex taken into account.
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spelling The soft-gluon limit and the infrared enhancement of the quark-gluon vertexThe Schwinger–Dyson quark equation (SDE) combined with results from lattice simulation for the propagators are used to obtain information on the quark-gluon vertex, taking into account the recent full QCD lattice results for the soft-gluon limit. Its inclusion leads to a clear enhancement of the infrared quark-gluon vertex.We also find that the relative contribution of the quark-ghost kernel to the quarkgluon vertex in the infrared region does not follow the rules from the perturbative analysis of the ultraviolet region. This shows that forQCDthe intuition based on perturbation theory does not apply to the full momentum range. The framework developed in the current work provides analytical expressions for all the longitudinal components of vertex taken into account.The Coimbra Physics Centre is supported by FCT through the project UID/FIS/04564/2016, also co-funded by COMPETE-UE. This work was supported in part by the project INCTFNAProc. no. 464898 /2014-5; by CAPES-FinanceCode 001 (CAPESPRINT 88887.374225 /2019-00) and under grant 88881.309870/2018- 01 (WP); by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) underGrants no. 308486/2015-3 (T.F.), 438562/2018- 6 and 313236/2018-6 (WP) and; by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) under the thematic Projects no. 2013/26258-4 and no. 2017/05660-0.Springer Nature2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/106065http://hdl.handle.net/10316/106065https://doi.org/10.1140/epjc/s10052-020-8037-0eng1434-60441434-6052Oliveira, OrlandoFrederico, Tobiasde Paula, Wayneinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-04-06T10:20:13Zoai:estudogeral.uc.pt:10316/106065Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:22:32.193744Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
title The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
spellingShingle The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
Oliveira, Orlando
title_short The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
title_full The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
title_fullStr The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
title_full_unstemmed The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
title_sort The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
author Oliveira, Orlando
author_facet Oliveira, Orlando
Frederico, Tobias
de Paula, Wayne
author_role author
author2 Frederico, Tobias
de Paula, Wayne
author2_role author
author
dc.contributor.author.fl_str_mv Oliveira, Orlando
Frederico, Tobias
de Paula, Wayne
description The Schwinger–Dyson quark equation (SDE) combined with results from lattice simulation for the propagators are used to obtain information on the quark-gluon vertex, taking into account the recent full QCD lattice results for the soft-gluon limit. Its inclusion leads to a clear enhancement of the infrared quark-gluon vertex.We also find that the relative contribution of the quark-ghost kernel to the quarkgluon vertex in the infrared region does not follow the rules from the perturbative analysis of the ultraviolet region. This shows that forQCDthe intuition based on perturbation theory does not apply to the full momentum range. The framework developed in the current work provides analytical expressions for all the longitudinal components of vertex taken into account.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/106065
http://hdl.handle.net/10316/106065
https://doi.org/10.1140/epjc/s10052-020-8037-0
url http://hdl.handle.net/10316/106065
https://doi.org/10.1140/epjc/s10052-020-8037-0
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1434-6044
1434-6052
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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