Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations

Detalhes bibliográficos
Autor(a) principal: Ghosh, Sabyasachi
Data de Publicação: 2015
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s13538-015-0352-9
http://hdl.handle.net/11449/160943
Resumo: Owing to the Kubo relation, the shear viscosities of pionic and nucleonic components have been evaluated from their corresponding retarded correlators of viscous stress tensor in the static limit, which become non-divergent only for the non-zero thermal widths of the constituent particles. In the real-time thermal field theory, the pion and nucleon thermal widths have respectively been obtained from the pion self-energy for different meson, baryon loops, and the nucleon self-energy for different pion-baryon loops. We have found non-monotonic momentum distributions of pion and nucleon thermal widths, which have been integrated out by their respective Bose-enhanced and Pauli-blocked phase space factors during evaluation of their shear viscosities. The viscosity to entropy density ratio for this mixed gas of pion-nucleon system decreases and approaches its lower bound as the temperature and baryon chemical potential increase within the relevant domain of hadronic matter.
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spelling Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal FluctuationsShear viscosityHadronic matterThermal field theoryOwing to the Kubo relation, the shear viscosities of pionic and nucleonic components have been evaluated from their corresponding retarded correlators of viscous stress tensor in the static limit, which become non-divergent only for the non-zero thermal widths of the constituent particles. In the real-time thermal field theory, the pion and nucleon thermal widths have respectively been obtained from the pion self-energy for different meson, baryon loops, and the nucleon self-energy for different pion-baryon loops. We have found non-monotonic momentum distributions of pion and nucleon thermal widths, which have been integrated out by their respective Bose-enhanced and Pauli-blocked phase space factors during evaluation of their shear viscosities. The viscosity to entropy density ratio for this mixed gas of pion-nucleon system decreases and approaches its lower bound as the temperature and baryon chemical potential increase within the relevant domain of hadronic matter.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, BrazilFAPESP: 2012/16766-0SpringerUniversidade Estadual Paulista (Unesp)Ghosh, Sabyasachi2018-11-26T16:17:21Z2018-11-26T16:17:21Z2015-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article687-698application/pdfhttp://dx.doi.org/10.1007/s13538-015-0352-9Brazilian Journal Of Physics. New York: Springer, v. 45, n. 6, p. 687-698, 2015.0103-9733http://hdl.handle.net/11449/16094310.1007/s13538-015-0352-9WOS:000364132300012WOS000364132300012.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal Of Physics0,276info:eu-repo/semantics/openAccess2023-11-07T06:08:49Zoai:repositorio.unesp.br:11449/160943Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:04:12.710257Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
title Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
spellingShingle Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
Ghosh, Sabyasachi
Shear viscosity
Hadronic matter
Thermal field theory
title_short Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
title_full Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
title_fullStr Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
title_full_unstemmed Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
title_sort Shear Viscosity of Pionic and Nucleonic Components from Their Different Possible Mesonic and Baryonic Thermal Fluctuations
author Ghosh, Sabyasachi
author_facet Ghosh, Sabyasachi
author_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Ghosh, Sabyasachi
dc.subject.por.fl_str_mv Shear viscosity
Hadronic matter
Thermal field theory
topic Shear viscosity
Hadronic matter
Thermal field theory
description Owing to the Kubo relation, the shear viscosities of pionic and nucleonic components have been evaluated from their corresponding retarded correlators of viscous stress tensor in the static limit, which become non-divergent only for the non-zero thermal widths of the constituent particles. In the real-time thermal field theory, the pion and nucleon thermal widths have respectively been obtained from the pion self-energy for different meson, baryon loops, and the nucleon self-energy for different pion-baryon loops. We have found non-monotonic momentum distributions of pion and nucleon thermal widths, which have been integrated out by their respective Bose-enhanced and Pauli-blocked phase space factors during evaluation of their shear viscosities. The viscosity to entropy density ratio for this mixed gas of pion-nucleon system decreases and approaches its lower bound as the temperature and baryon chemical potential increase within the relevant domain of hadronic matter.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-01
2018-11-26T16:17:21Z
2018-11-26T16:17:21Z
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/10.1007/s13538-015-0352-9
Brazilian Journal Of Physics. New York: Springer, v. 45, n. 6, p. 687-698, 2015.
0103-9733
http://hdl.handle.net/11449/160943
10.1007/s13538-015-0352-9
WOS:000364132300012
WOS000364132300012.pdf
url http://dx.doi.org/10.1007/s13538-015-0352-9
http://hdl.handle.net/11449/160943
identifier_str_mv Brazilian Journal Of Physics. New York: Springer, v. 45, n. 6, p. 687-698, 2015.
0103-9733
10.1007/s13538-015-0352-9
WOS:000364132300012
WOS000364132300012.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Brazilian Journal Of Physics
0,276
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 687-698
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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
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