Excluded volume effects in the quark-mass density-dependent model: Implications for the equation of state and compact star structure
- Autores
- Lugones, G.; Grunfeld, Ana Gabriela
- Año de publicación
- 2024
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Fil: Lugones, G.. Universidad Federal do Abc; Brasil
Fil: Grunfeld, Ana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina - Materia
-
equation of state of dense matter
neutron stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/232036
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:24:30Zoai: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:34982025-09-29 10:24:30.46CONICET 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 |
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 |
topic |
equation of state of dense matter neutron stars |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
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. Fil: Lugones, G.. Universidad Federal do Abc; Brasil Fil: Grunfeld, Ana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina |
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/ |
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application/pdf application/pdf |
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American Physical Society |
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American Physical Society |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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