Minimum of eta/s and the phase transition of the linear sigma model in the large-N limit

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dc.contributor.authorDobado González, Antonio
dc.contributor.authorLlanes Estrada, Felipe José
dc.contributor.authorTorres Rincón, Juan Miguel
dc.date.accessioned2023-06-20T03:32:30Z
dc.date.available2023-06-20T03:32:30Z
dc.date.issued2009-12
dc.description© 2009 The American Physical Society. The authors thank A. Gómez Nicola, D. Fernández Fraile, F. Sols, and D. Antonov for useful discussions as well as T. Schaefer and N. Demir for providing us their=s data. This work was supported by Grants No. FPA2007-29115-E, No. PR34-1856-BSCH, No. FPA2008-00592, No. FIS2008-01323, No. UCM-BSCH GR58/08 910309, UCM-Santander No. PR34/07-15875, and an FPU grant to J. M. T.-R.
dc.description.abstractWe reexamine the possibility of employing the viscosity over entropy density ratio as a diagnostic tool to identify a Phase transition in hadron physics to the strongly coupled quark-gluon plasma and other circumstances where direct measurement of the order parameter or the free energy may be difficult. It has been conjectured that the minimum of eta/s does indeed occur at the phase transition. We now make a careful assessment in a controlled theoretical framework, the linear sigma model at large N, and indeed find that the minimum of eta/s occurs near the second-order phase transition of the model due to the rapid variation of the order parameter (here the sigma vacuum expectation value) at a temperature slightly smaller than the critical one.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipUCM-Santander
dc.description.sponsorshipUCM-BSCH
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/21236
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dc.identifier.doi10.1103/PhysRevD.80.114015
dc.identifier.issn1550-7998
dc.identifier.officialurlhttp://prd.aps.org/abstract/PRD/v80/i11/e114015
dc.identifier.relatedurlhttp://prd.aps.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/43799
dc.issue.number11
dc.journal.titlePhysical Review D
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.projectIDFPA2007-29115-E
dc.relation.projectIDPR34-1856-BSCH
dc.relation.projectIDFPA2008-00592
dc.relation.projectIDFIS2008-01323
dc.relation.projectIDGR58/08 910309
dc.relation.projectIDPR34/07-15875
dc.rights.accessRightsopen access
dc.subject.cdu53
dc.subject.keywordChiral Perturbation-Theory
dc.subject.keywordTransport-Coefficients
dc.subject.keywordFluids
dc.subject.ucmFísica (Física)
dc.subject.unesco22 Física
dc.titleMinimum of eta/s and the phase transition of the linear sigma model in the large-N limit
dc.typejournal article
dc.volume.number80
dspace.entity.typePublication
relation.isAuthorOfPublication16523fad-99a9-422c-9a8e-c949ccffadec
relation.isAuthorOfPublication6290fe55-04e6-4532-91e6-1df735bdbdca
relation.isAuthorOfPublicationdf1ee7e5-a557-43b2-8b7a-f7f267eb1f47
relation.isAuthorOfPublication.latestForDiscovery16523fad-99a9-422c-9a8e-c949ccffadec
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