Interplay of dynamical and explicit chiral symmetry breaking effects on a quark
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.99.094027 http://hdl.handle.net/11449/228690 |
Resumo: | The relative contributions of explicit and dynamical chiral symmetry breaking in QCD models of the quark-gap equation are studied in dependence of frequently employed Ansätze for the dressed interaction and quark-gluon vertex. The explicit symmetry breaking contributions are defined by a constituent-quark sigma term whereas the combined effects of explicit and dynamical symmetry breaking are described by a Euclidean constituent-mass solution. We extend this study of the gap equation to a quark-gluon vertex beyond the Abelian approximation complemented with numerical gluon- and ghost-dressing functions from lattice QCD. We find that the ratio of the sigma term over the Euclidean mass is largely independent of nonperturbative interaction and vertex models for current-quark masses, mu,d(μ)≤m(μ)≤mb(μ), and equal contributions of explicit and dynamical chiral symmetry breaking occur at m(μ)≈400 MeV. For massive solutions of the gap equation with lattice propagators this value decreases to about 220 MeV. |
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Repositório Institucional da UNESP |
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Interplay of dynamical and explicit chiral symmetry breaking effects on a quarkThe relative contributions of explicit and dynamical chiral symmetry breaking in QCD models of the quark-gap equation are studied in dependence of frequently employed Ansätze for the dressed interaction and quark-gluon vertex. The explicit symmetry breaking contributions are defined by a constituent-quark sigma term whereas the combined effects of explicit and dynamical symmetry breaking are described by a Euclidean constituent-mass solution. We extend this study of the gap equation to a quark-gluon vertex beyond the Abelian approximation complemented with numerical gluon- and ghost-dressing functions from lattice QCD. We find that the ratio of the sigma term over the Euclidean mass is largely independent of nonperturbative interaction and vertex models for current-quark masses, mu,d(μ)≤m(μ)≤mb(μ), and equal contributions of explicit and dynamical chiral symmetry breaking occur at m(μ)≈400 MeV. For massive solutions of the gap equation with lattice propagators this value decreases to about 220 MeV.Instituto Tecnológico de Aeronáutica DCTAInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco IILaboratório de Física Teórica e Computacional Universidade Cruzeiro Do sul, Rua Galvão Bueno, 868Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco IIDCTAUniversidade Estadual Paulista (UNESP)Universidade Cruzeiro Do sulSerna, Fernando E. [UNESP]Chen, Chen [UNESP]El-Bennich, Bruno [UNESP]2022-04-29T08:28:05Z2022-04-29T08:28:05Z2019-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.99.094027Physical Review D, v. 99, n. 9, 2019.2470-00292470-0010http://hdl.handle.net/11449/22869010.1103/PhysRevD.99.0940272-s2.0-85066957217Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Dinfo:eu-repo/semantics/openAccess2022-04-29T08:28:05Zoai:repositorio.unesp.br:11449/228690Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:49:45.369200Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
title |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
spellingShingle |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark Serna, Fernando E. [UNESP] |
title_short |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
title_full |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
title_fullStr |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
title_full_unstemmed |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
title_sort |
Interplay of dynamical and explicit chiral symmetry breaking effects on a quark |
author |
Serna, Fernando E. [UNESP] |
author_facet |
Serna, Fernando E. [UNESP] Chen, Chen [UNESP] El-Bennich, Bruno [UNESP] |
author_role |
author |
author2 |
Chen, Chen [UNESP] El-Bennich, Bruno [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
DCTA Universidade Estadual Paulista (UNESP) Universidade Cruzeiro Do sul |
dc.contributor.author.fl_str_mv |
Serna, Fernando E. [UNESP] Chen, Chen [UNESP] El-Bennich, Bruno [UNESP] |
description |
The relative contributions of explicit and dynamical chiral symmetry breaking in QCD models of the quark-gap equation are studied in dependence of frequently employed Ansätze for the dressed interaction and quark-gluon vertex. The explicit symmetry breaking contributions are defined by a constituent-quark sigma term whereas the combined effects of explicit and dynamical symmetry breaking are described by a Euclidean constituent-mass solution. We extend this study of the gap equation to a quark-gluon vertex beyond the Abelian approximation complemented with numerical gluon- and ghost-dressing functions from lattice QCD. We find that the ratio of the sigma term over the Euclidean mass is largely independent of nonperturbative interaction and vertex models for current-quark masses, mu,d(μ)≤m(μ)≤mb(μ), and equal contributions of explicit and dynamical chiral symmetry breaking occur at m(μ)≈400 MeV. For massive solutions of the gap equation with lattice propagators this value decreases to about 220 MeV. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-05-01 2022-04-29T08:28:05Z 2022-04-29T08:28:05Z |
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/PhysRevD.99.094027 Physical Review D, v. 99, n. 9, 2019. 2470-0029 2470-0010 http://hdl.handle.net/11449/228690 10.1103/PhysRevD.99.094027 2-s2.0-85066957217 |
url |
http://dx.doi.org/10.1103/PhysRevD.99.094027 http://hdl.handle.net/11449/228690 |
identifier_str_mv |
Physical Review D, v. 99, n. 9, 2019. 2470-0029 2470-0010 10.1103/PhysRevD.99.094027 2-s2.0-85066957217 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D |
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_ |
1808128569654640640 |