The ratio of viscosity to entropy density in a pion gas satisfies the KSS holographic bound

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dc.creatorDobado, Antonio
dc.creatorLlanes-Estrada, Felipe J.
dc.date2006-09-25
dc.date2006-10-30
dc.date.accessioned2026-07-07T10:42:03Z
dc.date.available2026-07-07T10:42:03Z
dc.descriptionWe evaluate the ratio of shear viscosity to entropy density in a pion gas employing the Uehling-Uehlenbeck equation and experimental phase-shifts parameterized by means of the SU(2) Inverse Amplitude Method. We find that the ratio for this monocomponent gas stays well above the KSS 1/(4 pi) bound. We find similar results with other sets of phase shifts and conclude the bound is nowhere violated.
dc.description2 page text, three figures. V2: short comment and graph added to assert that a minimum of eta/s is not discarded from the hadron, low T side in a heavy-ion collision
dc.identifierhttps://arxiv.org/abs/hep-ph/0609255
dc.identifierhttp://arxiv.org/abs/hep-ph/0609255
dc.identifierEur.Phys.J.C49:1011-1013,2007
dc.identifierdoi:10.1140/epjc/s10052-006-0176-4
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181815
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThe ratio of viscosity to entropy density in a pion gas satisfies the KSS holographic bound
dc.typetext

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