Intrinsic glue and Wilson lines within dressed quarks
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevC.104.045201 http://hdl.handle.net/11449/231535 |
Resumo: | We construct a quark target model (QTM) to incorporate intrinsic glue into effective low-energy models of QCD, which often contain only quark degrees of freedom. This method guarantees the gauge invariance of observables order by order in the strong coupling. The quark and gluon PDFs for the dressed quarks are obtained in the QTM at leading order. We demonstrate gauge invariance of the results by comparing both covariant and light cone gauges, with the former including an explicit Wilson line contribution. A key finding is that in covariant gauges the Wilson line can carry a significant amount of the light cone momentum. With coupling strength and dressed quark mass , we find quark and gluon momentum fractions of and , where the Wilson line contribution to the quark momentum fraction is . We use the on-shell renormalization scheme and find that at one loop this Wilson line contribution does not depend on the covariant gauge but does vanish in light cone gauge as expected. This result demonstrates that it is crucial to account for Wilson line contributions when calculating quantum correlation functions in covariant gauges. We also consider the impact of a gluon mass using the gauge invariant formalism proposed by Cornwall, and combine these QTM results with two quark-level models to obtain quark and gluon PDFs for the pion. |
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Intrinsic glue and Wilson lines within dressed quarksWe construct a quark target model (QTM) to incorporate intrinsic glue into effective low-energy models of QCD, which often contain only quark degrees of freedom. This method guarantees the gauge invariance of observables order by order in the strong coupling. The quark and gluon PDFs for the dressed quarks are obtained in the QTM at leading order. We demonstrate gauge invariance of the results by comparing both covariant and light cone gauges, with the former including an explicit Wilson line contribution. A key finding is that in covariant gauges the Wilson line can carry a significant amount of the light cone momentum. With coupling strength and dressed quark mass , we find quark and gluon momentum fractions of and , where the Wilson line contribution to the quark momentum fraction is . We use the on-shell renormalization scheme and find that at one loop this Wilson line contribution does not depend on the covariant gauge but does vanish in light cone gauge as expected. This result demonstrates that it is crucial to account for Wilson line contributions when calculating quantum correlation functions in covariant gauges. We also consider the impact of a gluon mass using the gauge invariant formalism proposed by Cornwall, and combine these QTM results with two quark-level models to obtain quark and gluon PDFs for the pion.Office of ScienceU.S. Department of EnergyFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Argonne National LaboratoryConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Nuclear PhysicsNational Science FoundationInstituto de Fí Universidade Estadual Paulista São Paulo, 271 Bloco IIPhysics Division Argonne National LaboratoryDepartment of Physics University of WashingtonLaboratório de Fí Teórica e Computacional Universidade Cidade de São Paulo Sã, Rua Galvão Bueno 868Center for Nuclear Research Department of Physics Kent State UniversityCSSM Department of Physics University of AdelaideInstituto de Fí Universidade Estadual Paulista São Paulo, 271 Bloco IIFAPESP: 2018/20218-4Argonne National Laboratory: 2020-0020CNPq: 309262/2019-4CAPES: 88887.363682Nuclear Physics: DE-AC02-06CH11357National Science Foundation: NSF-PHY1516138Universidade Estadual Paulista (UNESP)Argonne National LaboratoryUniversity of WashingtonSãKent State UniversityUniversity of AdelaideCosta, Caroline S. R. [UNESP]Freese, AdamCloët, Ian C.El-Bennich, BrunoKrein, Gastão [UNESP]Tandy, Peter C.2022-04-29T08:46:01Z2022-04-29T08:46:01Z2021-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevC.104.045201Physical Review C, v. 104, n. 4, 2021.2469-99932469-9985http://hdl.handle.net/11449/23153510.1103/PhysRevC.104.0452012-s2.0-85117364243Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Cinfo:eu-repo/semantics/openAccess2022-04-29T08:46:01Zoai:repositorio.unesp.br:11449/231535Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-29T08:46:01Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Intrinsic glue and Wilson lines within dressed quarks |
title |
Intrinsic glue and Wilson lines within dressed quarks |
spellingShingle |
Intrinsic glue and Wilson lines within dressed quarks Costa, Caroline S. R. [UNESP] |
title_short |
Intrinsic glue and Wilson lines within dressed quarks |
title_full |
Intrinsic glue and Wilson lines within dressed quarks |
title_fullStr |
Intrinsic glue and Wilson lines within dressed quarks |
title_full_unstemmed |
Intrinsic glue and Wilson lines within dressed quarks |
title_sort |
Intrinsic glue and Wilson lines within dressed quarks |
author |
Costa, Caroline S. R. [UNESP] |
author_facet |
Costa, Caroline S. R. [UNESP] Freese, Adam Cloët, Ian C. El-Bennich, Bruno Krein, Gastão [UNESP] Tandy, Peter C. |
author_role |
author |
author2 |
Freese, Adam Cloët, Ian C. El-Bennich, Bruno Krein, Gastão [UNESP] Tandy, Peter C. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Argonne National Laboratory University of Washington Sã Kent State University University of Adelaide |
dc.contributor.author.fl_str_mv |
Costa, Caroline S. R. [UNESP] Freese, Adam Cloët, Ian C. El-Bennich, Bruno Krein, Gastão [UNESP] Tandy, Peter C. |
description |
We construct a quark target model (QTM) to incorporate intrinsic glue into effective low-energy models of QCD, which often contain only quark degrees of freedom. This method guarantees the gauge invariance of observables order by order in the strong coupling. The quark and gluon PDFs for the dressed quarks are obtained in the QTM at leading order. We demonstrate gauge invariance of the results by comparing both covariant and light cone gauges, with the former including an explicit Wilson line contribution. A key finding is that in covariant gauges the Wilson line can carry a significant amount of the light cone momentum. With coupling strength and dressed quark mass , we find quark and gluon momentum fractions of and , where the Wilson line contribution to the quark momentum fraction is . We use the on-shell renormalization scheme and find that at one loop this Wilson line contribution does not depend on the covariant gauge but does vanish in light cone gauge as expected. This result demonstrates that it is crucial to account for Wilson line contributions when calculating quantum correlation functions in covariant gauges. We also consider the impact of a gluon mass using the gauge invariant formalism proposed by Cornwall, and combine these QTM results with two quark-level models to obtain quark and gluon PDFs for the pion. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-10-01 2022-04-29T08:46:01Z 2022-04-29T08:46:01Z |
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://dx.doi.org/10.1103/PhysRevC.104.045201 Physical Review C, v. 104, n. 4, 2021. 2469-9993 2469-9985 http://hdl.handle.net/11449/231535 10.1103/PhysRevC.104.045201 2-s2.0-85117364243 |
url |
http://dx.doi.org/10.1103/PhysRevC.104.045201 http://hdl.handle.net/11449/231535 |
identifier_str_mv |
Physical Review C, v. 104, n. 4, 2021. 2469-9993 2469-9985 10.1103/PhysRevC.104.045201 2-s2.0-85117364243 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review C |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803650009671925760 |