Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions

Heavy ion reactions provide a unique opportunity to unveil the Equation of State (EoS) of baryonic matter in a large density domain. However, to get quantitative constraints it is crucial to employ observables that are as insensitive as possible to final state interaction, and at the same time robus...

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Detalhes bibliográficos
Autores: Ciampi, Caterina, Dueñas Díaz, José Antonio, Vient, E.
Tipo de documento: artigo
Data de publicação:2025
País:España
Recursos:Universidad de Huelva (UHU)
Repositório:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglês
OAI Identifier:oai:ariasmontano.uhu.es:10272/27470
Acesso em linha:https://hdl.handle.net/10272/27470
Access Level:Acceso aberto
Palavra-chave:Nuclear equation of state
Symmetry energy
Isospin transport
Isospin diffusion
2207 Física Atómica y Nuclear
2212 Física Teórica
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spelling Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisionsCiampi, CaterinaDueñas Díaz, José AntonioVient, E.Nuclear equation of stateSymmetry energyIsospin transportIsospin diffusion2207 Física Atómica y Nuclear2212 Física TeóricaHeavy ion reactions provide a unique opportunity to unveil the Equation of State (EoS) of baryonic matter in a large density domain. However, to get quantitative constraints it is crucial to employ observables that are as insensitive as possible to final state interaction, and at the same time robustly predicted by transport models with limited model dependence. In this work, we compare for the first time BUU transport calculations to the impact parameter dependence of the isospin transport ratio deduced from INDRA-FAZIA data [1], with a model independent evaluation of the impact parameter. Using different state-of-the-art nuclear functionals, provided both by fits of ab initio calculations and by phenomenological approaches, a confidence region for the symmetry energy is extracted. A consistent study of the time dependence of the baryonic density and of the isospin current density allows a precise determination of the density region significantly probed by the experiment, with the definition of confidence regions in the symmetry energy vs density plane. A symmetry energy = (29.0 ± 0.7) MeV is obtained for the most significant density ∕0 = 1.01. The obtained symmetry energy constraint can be used to inform Bayesian inference of the neutron star EoS.Elsevier20252025-01-0120252025-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10272/27470reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/274702026-06-02T14:58:11Z
dc.title.none.fl_str_mv Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
title Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
spellingShingle Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
Ciampi, Caterina
Nuclear equation of state
Symmetry energy
Isospin transport
Isospin diffusion
2207 Física Atómica y Nuclear
2212 Física Teórica
title_short Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
title_full Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
title_fullStr Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
title_full_unstemmed Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
title_sort Constraining the nuclear symmetry energy with Fermi-energy heavy ion collisions
dc.creator.none.fl_str_mv Ciampi, Caterina
Dueñas Díaz, José Antonio
Vient, E.
author Ciampi, Caterina
author_facet Ciampi, Caterina
Dueñas Díaz, José Antonio
Vient, E.
author_role author
author2 Dueñas Díaz, José Antonio
Vient, E.
author2_role author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Nuclear equation of state
Symmetry energy
Isospin transport
Isospin diffusion
2207 Física Atómica y Nuclear
2212 Física Teórica
topic Nuclear equation of state
Symmetry energy
Isospin transport
Isospin diffusion
2207 Física Atómica y Nuclear
2212 Física Teórica
description Heavy ion reactions provide a unique opportunity to unveil the Equation of State (EoS) of baryonic matter in a large density domain. However, to get quantitative constraints it is crucial to employ observables that are as insensitive as possible to final state interaction, and at the same time robustly predicted by transport models with limited model dependence. In this work, we compare for the first time BUU transport calculations to the impact parameter dependence of the isospin transport ratio deduced from INDRA-FAZIA data [1], with a model independent evaluation of the impact parameter. Using different state-of-the-art nuclear functionals, provided both by fits of ab initio calculations and by phenomenological approaches, a confidence region for the symmetry energy is extracted. A consistent study of the time dependence of the baryonic density and of the isospin current density allows a precise determination of the density region significantly probed by the experiment, with the definition of confidence regions in the symmetry energy vs density plane. A symmetry energy = (29.0 ± 0.7) MeV is obtained for the most significant density ∕0 = 1.01. The obtained symmetry energy constraint can be used to inform Bayesian inference of the neutron star EoS.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-01-01
2025
2025-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10272/27470
url https://hdl.handle.net/10272/27470
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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