Shear viscosity of a pion gas resulting from rho pi pi and sigma pi pi interactions

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dc.contributor.authorGhosh, Sabyasachi [UNESP]
dc.contributor.authorKrein, Gastao [UNESP]
dc.contributor.authorSarkar, Sourav
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCtr Variable Energy Cyclotron
dc.date.accessioned2014-12-03T13:11:19Z
dc.date.available2014-12-03T13:11:19Z
dc.date.issued2014-04-02
dc.description.abstractWe have evaluated the shear viscosity of pion gas with vanishing chemical potential taking into account its scattering with the low mass resonances sigma and rho during propagation in the medium. The thermal width (or collisional rate) of pions is calculated from pi sigma and pi rho loop diagrams using effective interactions in the real-time formulation of finite temperature field theory. A very small value of shear viscosity by entropy density ratio (eta/s), close to the quantum bound, is obtained which approximately matches the range of values eta/s used by Niemi et al. [H. Niemi, G. S. Denicol, P. Huovinen, E. Molnar, and D. H. Rischke, Phys. Rev. Lett. 106, 212302 (2011); Phys. Rev. C 86, 014909 (2012)] to fit the elliptic flow data from the Relativistic Heavy Ion Collider.en
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationCtr Variable Energy Cyclotron, Div Theoret Phys, Kolkata 700064, India
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.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 09/50180-0
dc.description.sponsorshipIdFAPESP: 12/16766-0
dc.description.sponsorshipIdFAPESP: 13/01907-0
dc.description.sponsorshipIdCNPq: 305894/2009-9
dc.format.extent7
dc.identifierhttp://dx.doi.org/10.1103/PhysRevC.89.045201
dc.identifier.citationPhysical Review C. College Pk: Amer Physical Soc, v. 89, n. 4, 7 p., 2014.
dc.identifier.doi10.1103/PhysRevC.89.045201
dc.identifier.fileWOS000334295700001.pdf
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/11449/113014
dc.identifier.wosWOS:000334295700001
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review C
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleShear viscosity of a pion gas resulting from rho pi pi and sigma pi pi interactionsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.author.orcid0000-0002-2952-3767[3]
unesp.author.orcid0000-0003-1713-8578[2]
unesp.author.orcid0000-0003-1212-824X[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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