Nucleon thermal width owing to pion-baryon loops and its contributions to shear viscosity

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dc.contributor.authorGhosh, Sabyasachi
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-03-18T15:54:47Z
dc.date.available2015-03-18T15:54:47Z
dc.date.issued2014-08-07
dc.description.abstractIn real-time thermal field theory, the standard expression of shear viscosity for nucleonic constituents is derived from the two-point function of nucleonic viscous stress tensors at finite temperature and density. The finite thermal width or Landau damping is traditionally included in the nucleon propagators. This thermal width is calculated from the in-medium self-energy of nucleons for different possible pion-baryon loops. The dynamical part of nucleon-pion-baryon interactions are accounted for by the effective Lagrangian densities of standard hadronic model. The shear viscosity to entropy density ratio of the nucleonic component decreases with the temperature and increases with the nucleon chemical potential. However, adding the contribution of the pionic component, the total viscosity to entropy density ratio also reduces with the nucleon chemical potential when the mixing effect between pion and nucleon components in the mixed gas is considered. Within the hadronic domain, the viscosity to entropy density ratio of the nuclear matter gradually reduces as temperature and nucleon chemical potential increase and therefore the nuclear matter is approaching the (nearly) perfect-fluid state.en
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 12/16766-0
dc.format.extent10
dc.identifierhttp://dx.doi.org/10.1103/PhysRevC.90.025202
dc.identifier.citationPhysical Review C. College Pk: Amer Physical Soc, v. 90, n. 2, 10 p., 2014.
dc.identifier.doi10.1103/PhysRevC.90.025202
dc.identifier.fileWOS000339995000004.pdf
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/11449/117040
dc.identifier.wosWOS:000339995000004
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review C
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleNucleon thermal width owing to pion-baryon loops and its contributions to shear viscosityen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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