Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model

Detalhes bibliográficos
Autor(a) principal: Ghosh, Sabyasachi [UNESP]
Data de Publicação: 2016
Outros Autores: Peixoto, Thiago C. [UNESP], Roy, Victor, Serna, Fernando E. [UNESP], Krein, Gastão [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevC.93.045205
http://hdl.handle.net/11449/228146
Resumo: We have calculated the temperature dependence of shear η and bulk ζ viscosities of quark matter due to quark-meson fluctuations. The quark thermal width originating from quantum fluctuations of quark-π and quark-σ loops at finite temperature is calculated with the formalism of real-time thermal field theory. Temperature-dependent constituent-quark and meson masses and quark-meson couplings are obtained in the Nambu-Jona-Lasinio model. We found a nontrivial influence of the temperature-dependent masses and couplings on the Landau-cut structure of the quark self-energy. Our results for the ratios η/s and ζ/s, where s is the entropy density (also determined in the Nambu-Jona-Lasinio model in the quasiparticle approximation), are in fair agreement with results of the literature obtained from different models and techniques. In particular, our result for η/s has a minimum very close to the quantum lower bound, η/s=1/4π.
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spelling Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio modelWe have calculated the temperature dependence of shear η and bulk ζ viscosities of quark matter due to quark-meson fluctuations. The quark thermal width originating from quantum fluctuations of quark-π and quark-σ loops at finite temperature is calculated with the formalism of real-time thermal field theory. Temperature-dependent constituent-quark and meson masses and quark-meson couplings are obtained in the Nambu-Jona-Lasinio model. We found a nontrivial influence of the temperature-dependent masses and couplings on the Landau-cut structure of the quark self-energy. Our results for the ratios η/s and ζ/s, where s is the entropy density (also determined in the Nambu-Jona-Lasinio model in the quasiparticle approximation), are in fair agreement with results of the literature obtained from different models and techniques. In particular, our result for η/s has a minimum very close to the quantum lower bound, η/s=1/4π.Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 Bloco IIInstitut für Theoretische Physik Johann Wolfgang Goethe-Universität, Max-von-Laue-Straße 1Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 Bloco IIUniversidade Estadual Paulista (UNESP)Johann Wolfgang Goethe-UniversitätGhosh, Sabyasachi [UNESP]Peixoto, Thiago C. [UNESP]Roy, VictorSerna, Fernando E. [UNESP]Krein, Gastão [UNESP]2022-04-29T07:35:48Z2022-04-29T07:35:48Z2016-04-13info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevC.93.045205Physical Review C, v. 93, n. 4, 2016.2469-99932469-9985http://hdl.handle.net/11449/22814610.1103/PhysRevC.93.0452052-s2.0-84964344862Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Cinfo:eu-repo/semantics/openAccess2022-04-29T07:35:48Zoai:repositorio.unesp.br:11449/228146Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:12:11.490816Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
title Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
spellingShingle Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
Ghosh, Sabyasachi [UNESP]
title_short Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
title_full Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
title_fullStr Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
title_full_unstemmed Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
title_sort Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
author Ghosh, Sabyasachi [UNESP]
author_facet Ghosh, Sabyasachi [UNESP]
Peixoto, Thiago C. [UNESP]
Roy, Victor
Serna, Fernando E. [UNESP]
Krein, Gastão [UNESP]
author_role author
author2 Peixoto, Thiago C. [UNESP]
Roy, Victor
Serna, Fernando E. [UNESP]
Krein, Gastão [UNESP]
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Johann Wolfgang Goethe-Universität
dc.contributor.author.fl_str_mv Ghosh, Sabyasachi [UNESP]
Peixoto, Thiago C. [UNESP]
Roy, Victor
Serna, Fernando E. [UNESP]
Krein, Gastão [UNESP]
description We have calculated the temperature dependence of shear η and bulk ζ viscosities of quark matter due to quark-meson fluctuations. The quark thermal width originating from quantum fluctuations of quark-π and quark-σ loops at finite temperature is calculated with the formalism of real-time thermal field theory. Temperature-dependent constituent-quark and meson masses and quark-meson couplings are obtained in the Nambu-Jona-Lasinio model. We found a nontrivial influence of the temperature-dependent masses and couplings on the Landau-cut structure of the quark self-energy. Our results for the ratios η/s and ζ/s, where s is the entropy density (also determined in the Nambu-Jona-Lasinio model in the quasiparticle approximation), are in fair agreement with results of the literature obtained from different models and techniques. In particular, our result for η/s has a minimum very close to the quantum lower bound, η/s=1/4π.
publishDate 2016
dc.date.none.fl_str_mv 2016-04-13
2022-04-29T07:35:48Z
2022-04-29T07:35:48Z
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.93.045205
Physical Review C, v. 93, n. 4, 2016.
2469-9993
2469-9985
http://hdl.handle.net/11449/228146
10.1103/PhysRevC.93.045205
2-s2.0-84964344862
url http://dx.doi.org/10.1103/PhysRevC.93.045205
http://hdl.handle.net/11449/228146
identifier_str_mv Physical Review C, v. 93, n. 4, 2016.
2469-9993
2469-9985
10.1103/PhysRevC.93.045205
2-s2.0-84964344862
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
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