dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T14:08:39Z
dc.date.available2014-05-20T14:08:39Z
dc.date.created2014-05-20T14:08:39Z
dc.date.issued2011-02-01
dc.identifierNuclear Physics A. Amsterdam: Elsevier B.V., v. 851, n. 1, p. 44-57, 2011.
dc.identifier0375-9474
dc.identifierhttp://hdl.handle.net/11449/24036
dc.identifier10.1016/j.nuclphysa.2010.12.011
dc.identifierWOS:000287292300003
dc.description.abstractWe calculate the spectra of produced thermal photons in Au + Au collisions taking into account the nonequilibrium contribution to photon production due to finite shear viscosity. The evolution of the fireball is modeled by second-order as well as by divergence-type 2 + 1 dissipative hydrodynamics, both with an ideal equation of state and with one based on Lattice QCD that includes an analytical crossover. The spectrum calculated in the divergence-type theory is considerably enhanced with respect to the one calculated in the second-order theory, the difference being entirely due to differences in the viscous corrections to photon production. Our results show that the differences in hydrodynamic formalisms are an important source of uncertainty in the extraction of the value of eta/s from measured photon spectra. The uncertainty in the value of eta/s associated with different hydrodynamic models used to compute thermal photon spectra is larger than the one occurring in matching hadron elliptic flow to RHIC data. (C) 2010 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationNuclear Physics A
dc.relation1.992
dc.relation0,938
dc.rightsAcesso aberto
dc.sourceWeb of Science
dc.subjectThermal photons spectra
dc.subjectHeavy-ion collisions
dc.subjectRelativistic dissipative hydrodynamics
dc.titleThermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms
dc.typeArtículos de revistas


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