Shear and bulk viscosities of quark matter from quark-meson fluctuations in the Nambu-Jona-Lasinio model
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
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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Repositório Institucional da UNESP |
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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 |
|
_version_ |
1808128331221041152 |