Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.nuclphysa.2010.12.011 http://hdl.handle.net/11449/24036 |
Resumo: | We 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. |
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Repositório Institucional da UNESP |
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Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalismsThermal photons spectraHeavy-ion collisionsRelativistic dissipative hydrodynamicsWe 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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Paulista, Inst Fis Teor, BR-01140070 São Paulo, BrazilUniv São Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 São Paulo, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01140070 São Paulo, BrazilElsevier B.V.Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Peralta-Ramos, J. [UNESP]Nakwacki, M. S.2014-05-20T14:08:39Z2014-05-20T14:08:39Z2011-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article44-57http://dx.doi.org/10.1016/j.nuclphysa.2010.12.011Nuclear Physics A. Amsterdam: Elsevier B.V., v. 851, n. 1, p. 44-57, 2011.0375-9474http://hdl.handle.net/11449/2403610.1016/j.nuclphysa.2010.12.011WOS:000287292300003Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNuclear Physics A1.9920,938info:eu-repo/semantics/openAccess2021-10-23T10:58:35Zoai:repositorio.unesp.br:11449/24036Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:47:11.320787Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
title |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
spellingShingle |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms Peralta-Ramos, J. [UNESP] Thermal photons spectra Heavy-ion collisions Relativistic dissipative hydrodynamics |
title_short |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
title_full |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
title_fullStr |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
title_full_unstemmed |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
title_sort |
Thermal photon production in Au plus Au collisions: Viscous corrections in two different hydrodynamic formalisms |
author |
Peralta-Ramos, J. [UNESP] |
author_facet |
Peralta-Ramos, J. [UNESP] Nakwacki, M. S. |
author_role |
author |
author2 |
Nakwacki, M. S. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Peralta-Ramos, J. [UNESP] Nakwacki, M. S. |
dc.subject.por.fl_str_mv |
Thermal photons spectra Heavy-ion collisions Relativistic dissipative hydrodynamics |
topic |
Thermal photons spectra Heavy-ion collisions Relativistic dissipative hydrodynamics |
description |
We 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. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-02-01 2014-05-20T14:08:39Z 2014-05-20T14:08:39Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.nuclphysa.2010.12.011 Nuclear Physics A. Amsterdam: Elsevier B.V., v. 851, n. 1, p. 44-57, 2011. 0375-9474 http://hdl.handle.net/11449/24036 10.1016/j.nuclphysa.2010.12.011 WOS:000287292300003 |
url |
http://dx.doi.org/10.1016/j.nuclphysa.2010.12.011 http://hdl.handle.net/11449/24036 |
identifier_str_mv |
Nuclear Physics A. Amsterdam: Elsevier B.V., v. 851, n. 1, p. 44-57, 2011. 0375-9474 10.1016/j.nuclphysa.2010.12.011 WOS:000287292300003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Nuclear Physics A 1.992 0,938 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
44-57 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128700720349184 |