The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
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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