Intrinsic glue and Wilson lines within dressed quarks

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dc.contributor.authorCosta, Caroline S. R. [UNESP]
dc.contributor.authorFreese, Adam
dc.contributor.authorCloët, Ian C.
dc.contributor.authorEl-Bennich, Bruno
dc.contributor.authorKrein, Gastão [UNESP]
dc.contributor.authorTandy, Peter C.
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionArgonne National Laboratory
dc.contributor.institutionUniversity of Washington
dc.contributor.institutionSã
dc.contributor.institutionKent State University
dc.contributor.institutionUniversity of Adelaide
dc.date.accessioned2022-04-29T08:46:01Z
dc.date.available2022-04-29T08:46:01Z
dc.date.issued2021-10-01
dc.description.abstractWe 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.en
dc.description.affiliationInstituto de Fí Universidade Estadual Paulista São Paulo, 271 Bloco II
dc.description.affiliationPhysics Division Argonne National Laboratory
dc.description.affiliationDepartment of Physics University of Washington
dc.description.affiliationLaboratório de Fí Teórica e Computacional Universidade Cidade de São Paulo Sã, Rua Galvão Bueno 868
dc.description.affiliationCenter for Nuclear Research Department of Physics Kent State University
dc.description.affiliationCSSM Department of Physics University of Adelaide
dc.description.affiliationUnespInstituto de Fí Universidade Estadual Paulista São Paulo, 271 Bloco II
dc.description.sponsorshipOffice of Science
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipArgonne National Laboratory
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipNuclear Physics
dc.description.sponsorshipNational Science Foundation
dc.description.sponsorshipIdFAPESP: 2018/20218-4
dc.description.sponsorshipIdArgonne National Laboratory: 2020-0020
dc.description.sponsorshipIdCNPq: 309262/2019-4
dc.description.sponsorshipIdCAPES: 88887.363682
dc.description.sponsorshipIdNuclear Physics: DE-AC02-06CH11357
dc.description.sponsorshipIdNational Science Foundation: NSF-PHY1516138
dc.identifierhttp://dx.doi.org/10.1103/PhysRevC.104.045201
dc.identifier.citationPhysical Review C, v. 104, n. 4, 2021.
dc.identifier.doi10.1103/PhysRevC.104.045201
dc.identifier.issn2469-9993
dc.identifier.issn2469-9985
dc.identifier.scopus2-s2.0-85117364243
dc.identifier.urihttp://hdl.handle.net/11449/231535
dc.language.isoeng
dc.relation.ispartofPhysical Review C
dc.sourceScopus
dc.titleIntrinsic glue and Wilson lines within dressed quarksen
dc.typeArtigo
unesp.author.orcid0000-0003-1392-837X[1]
unesp.author.orcid0000-0001-7050-0148[4]
unesp.author.orcid0000-0002-6551-6919 0000-0002-6551-6919[6]

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