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/11449/185742 |
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 Ansatze 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, m(u,d)(mu) <= m(mu) <= m(b)(mu), and equal contributions of explicit and dynamical chiral symmetry breaking occur at m(mu) approximate to 400 MeV. For massive solutions of the gap equation with lattice propagators this value decreases to about 200 MeV. |
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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 Ansatze 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, m(u,d)(mu) <= m(mu) <= m(b)(mu), and equal contributions of explicit and dynamical chiral symmetry breaking occur at m(mu) approximate to 400 MeV. For massive solutions of the gap equation with lattice propagators this value decreases to about 200 MeV.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)DCTA, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, SP, BrazilUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271,Bloco 2, BR-01140070 Sao Paulo, SP, BrazilUniv Cruzeiro Sul, Lab Fis Teor & Computac, Rua Galvao Bueno 868, BR-01506000 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271,Bloco 2, BR-01140070 Sao Paulo, SP, BrazilCNPq: 168240/2017-3CNPq: 307485/2017-0CAPES: 1811288CAPES: 086/2013FAPESP: 2016/03154-7FAPESP: 2015/21550-4Amer Physical SocDCTAUniversidade Estadual Paulista (Unesp)Univ Cruzeiro SulSerna, Fernando E. [UNESP]Chen, Chen [UNESP]El-Bennich, Bruno [UNESP]2019-10-04T12:38:13Z2019-10-04T12:38:13Z2019-05-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article9http://dx.doi.org/10.1103/PhysRevD.99.094027Physical Review D. College Pk: Amer Physical Soc, v. 99, n. 9, 9 p., 2019.2470-0010http://hdl.handle.net/11449/18574210.1103/PhysRevD.99.094027WOS:000469019900002Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Dinfo:eu-repo/semantics/openAccess2021-10-22T18:13:10Zoai:repositorio.unesp.br:11449/185742Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:24:03.924481Repositório 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) Univ Cruzeiro 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 Ansatze 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, m(u,d)(mu) <= m(mu) <= m(b)(mu), and equal contributions of explicit and dynamical chiral symmetry breaking occur at m(mu) approximate to 400 MeV. For massive solutions of the gap equation with lattice propagators this value decreases to about 200 MeV. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-04T12:38:13Z 2019-10-04T12:38:13Z 2019-05-20 |
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. College Pk: Amer Physical Soc, v. 99, n. 9, 9 p., 2019. 2470-0010 http://hdl.handle.net/11449/185742 10.1103/PhysRevD.99.094027 WOS:000469019900002 |
url |
http://dx.doi.org/10.1103/PhysRevD.99.094027 http://hdl.handle.net/11449/185742 |
identifier_str_mv |
Physical Review D. College Pk: Amer Physical Soc, v. 99, n. 9, 9 p., 2019. 2470-0010 10.1103/PhysRevD.99.094027 WOS:000469019900002 |
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.format.none.fl_str_mv |
9 |
dc.publisher.none.fl_str_mv |
Amer Physical Soc |
publisher.none.fl_str_mv |
Amer Physical Soc |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1808128644093050880 |