Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure

We present a significant extension of the quark-mass density-dependent model (QMDDM), initially revised in our prior study [Phys. Rev. D 107, 043025 (2023)], where thermodynamic inconsistencies were addressed. Our current work enriches the QMDDM by incorporating excluded volume effects, as a step to...

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Detalles Bibliográficos
Autores: Lugones, G., Grunfeld, Ana Gabriela
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/232036
Acceso en línea:http://hdl.handle.net/11336/232036
Access Level:acceso abierto
Palabra clave:equation of state of dense matter
neutron stars
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structureLugones, G.Grunfeld, Ana Gabrielaequation of state of dense matterneutron starshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a significant extension of the quark-mass density-dependent model (QMDDM), initially revised in our prior study [Phys. Rev. D 107, 043025 (2023)], where thermodynamic inconsistencies were addressed. Our current work enriches the QMDDM by incorporating excluded volume effects, as a step toward a more realistic representation of the quark matter equation of state (EOS) at zero temperature. We introduce the concept of “available volume” in the Helmholtz free energy formulation, accounting for the space excluded by each quasiparticle due to its finite size or repulsive interactions. We present a methodology to modify the EOS for pointlike particles, allowing for a simple and direct incorporation of excluded volume effects. This is first addressed in a simple one-flavor model and then extended to a more realistic three-flavor system, incorporating both mass and volume dependencies on the baryon number density. We examine various Ansätze for the excluded volume, ultimately adopting one that aligns with the asymptotic freedom behavior of quantum chromodynamics. The EOS for electrically neutral systems in chemical equilibrium is computed, focusing on self-bound and hybrid matter scenarios. We show that the incorporation of excluded volume effects renders the EOS stiffer and that excluded volume effects are essential to align the mass-radius relation of self-bound and hybrid stars with modern astrophysical constraints.Fil: Lugones, G.. Universidad Federal do Abc; BrasilFil: Grunfeld, Ana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaAmerican Physical Society2024-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/232036Lugones, G. ; Grunfeld, Ana Gabriela; Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure; American Physical Society; Physical Review D; 109; 6; 3-2024; 1-170556-2821CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.109.063025info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.109.063025info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:11:59Zoai:ri.conicet.gov.ar:11336/232036instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 14:11:59.593CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
title Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
spellingShingle Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
Lugones, G.
equation of state of dense matter
neutron stars
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
title_full Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
title_fullStr Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
title_full_unstemmed Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
title_sort Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
dc.creator.none.fl_str_mv Lugones, G.
Grunfeld, Ana Gabriela
author Lugones, G.
author_facet Lugones, G.
Grunfeld, Ana Gabriela
author_role author
author2 Grunfeld, Ana Gabriela
author2_role author
dc.subject.none.fl_str_mv equation of state of dense matter
neutron stars
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic equation of state of dense matter
neutron stars
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description We present a significant extension of the quark-mass density-dependent model (QMDDM), initially revised in our prior study [Phys. Rev. D 107, 043025 (2023)], where thermodynamic inconsistencies were addressed. Our current work enriches the QMDDM by incorporating excluded volume effects, as a step toward a more realistic representation of the quark matter equation of state (EOS) at zero temperature. We introduce the concept of “available volume” in the Helmholtz free energy formulation, accounting for the space excluded by each quasiparticle due to its finite size or repulsive interactions. We present a methodology to modify the EOS for pointlike particles, allowing for a simple and direct incorporation of excluded volume effects. This is first addressed in a simple one-flavor model and then extended to a more realistic three-flavor system, incorporating both mass and volume dependencies on the baryon number density. We examine various Ansätze for the excluded volume, ultimately adopting one that aligns with the asymptotic freedom behavior of quantum chromodynamics. The EOS for electrically neutral systems in chemical equilibrium is computed, focusing on self-bound and hybrid matter scenarios. We show that the incorporation of excluded volume effects renders the EOS stiffer and that excluded volume effects are essential to align the mass-radius relation of self-bound and hybrid stars with modern astrophysical constraints.
publishDate 2024
dc.date.none.fl_str_mv 2024-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/232036
Lugones, G. ; Grunfeld, Ana Gabriela; Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure; American Physical Society; Physical Review D; 109; 6; 3-2024; 1-17
0556-2821
CONICET Digital
CONICET
url http://hdl.handle.net/11336/232036
identifier_str_mv Lugones, G. ; Grunfeld, Ana Gabriela; Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure; American Physical Society; Physical Review D; 109; 6; 3-2024; 1-17
0556-2821
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.109.063025
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.109.063025
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15.811543

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