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/11449/161409 |
Resumo: | We have calculated the temperature dependence of shear eta and bulk zeta viscosities of quark matter due to quark-meson fluctuations. The quark thermal width originating from quantum fluctuations of quark-pi and quark-sigma 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 eta/s and zeta/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 eta/s has a minimum very close to the quantum lower bound, eta/s = 1/4 pi. |
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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 eta and bulk zeta viscosities of quark matter due to quark-meson fluctuations. The quark thermal width originating from quantum fluctuations of quark-pi and quark-sigma 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 eta/s and zeta/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 eta/s has a minimum very close to the quantum lower bound, eta/s = 1/4 pi.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Alexander von Humboldt FoundationUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz,271 Bloco 2, BR-01140070 Sao Paulo, BrazilGoethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, GermanyUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz,271 Bloco 2, BR-01140070 Sao Paulo, BrazilFAPESP: 2009/50180-0FAPESP: 2012/16766-0FAPESP: 2013/01907-0CNPq: 305894/2009-9Amer Physical SocUniversidade Estadual Paulista (Unesp)Goethe Univ FrankfurtGhosh, Sabyasachi [UNESP]Peixoto, Thiago C. [UNESP]Roy, VictorSerna, Fernando E. [UNESP]Krein, Gastao [UNESP]2018-11-26T16:32:38Z2018-11-26T16:32:38Z2016-04-13info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article9application/pdfhttp://dx.doi.org/10.1103/PhysRevC.93.045205Physical Review C. College Pk: Amer Physical Soc, v. 93, n. 4, 9 p., 2016.2469-9985http://hdl.handle.net/11449/16140910.1103/PhysRevC.93.045205WOS:000373881100002WOS000373881100002.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review C1,443info:eu-repo/semantics/openAccess2024-01-14T06:26:26Zoai:repositorio.unesp.br:11449/161409Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:59:58.135078Repositório 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, Gastao [UNESP] |
author_role |
author |
author2 |
Peixoto, Thiago C. [UNESP] Roy, Victor Serna, Fernando E. [UNESP] Krein, Gastao [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Goethe Univ Frankfurt |
dc.contributor.author.fl_str_mv |
Ghosh, Sabyasachi [UNESP] Peixoto, Thiago C. [UNESP] Roy, Victor Serna, Fernando E. [UNESP] Krein, Gastao [UNESP] |
description |
We have calculated the temperature dependence of shear eta and bulk zeta viscosities of quark matter due to quark-meson fluctuations. The quark thermal width originating from quantum fluctuations of quark-pi and quark-sigma 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 eta/s and zeta/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 eta/s has a minimum very close to the quantum lower bound, eta/s = 1/4 pi. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-13 2018-11-26T16:32:38Z 2018-11-26T16:32:38Z |
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. College Pk: Amer Physical Soc, v. 93, n. 4, 9 p., 2016. 2469-9985 http://hdl.handle.net/11449/161409 10.1103/PhysRevC.93.045205 WOS:000373881100002 WOS000373881100002.pdf |
url |
http://dx.doi.org/10.1103/PhysRevC.93.045205 http://hdl.handle.net/11449/161409 |
identifier_str_mv |
Physical Review C. College Pk: Amer Physical Soc, v. 93, n. 4, 9 p., 2016. 2469-9985 10.1103/PhysRevC.93.045205 WOS:000373881100002 WOS000373881100002.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review C 1,443 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
9 application/pdf |
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_ |
1808129480402665472 |