Causality violation and the speed of sound of hot and dense quark matter in the Nambu-Jona-Lasinio model

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Autor(es): dc.contributorUniversidade Federal de Sergipe (UFS)-
Autor(es): dc.contributorUniversidade Federal de Santa Catarina (UFSC)-
Autor(es): dc.contributorUniversidade do Estado do Rio de Janeiro (UERJ)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorPasqualotto, Arthur E. B.-
Autor(es): dc.creatorFarias, Ricardo L. S.-
Autor(es): dc.creatorTavares, William R.-
Autor(es): dc.creatorAvancini, Sidney S.-
Autor(es): dc.creatorKrein, Gastao-
Data de aceite: dc.date.accessioned2025-08-21T22:49:09Z-
Data de disponibilização: dc.date.available2025-08-21T22:49:09Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-05-23-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.107.096017-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/297831-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/297831-
Descrição: dc.descriptionThe Nambu-Jona-Lasinio model is widely used to study strong -interaction phenomena in vacuum and quark matter. Since the model is nonrenormalizable, one needs to work within a specific regularization scheme to obtain finite results. Here we show that a commonly used cutoff regularization scheme leads to unphysical results, such as superluminal speed of sound and wrong high -temperature behavior of the specific heat and other thermodynamical quantities. Such a troublesome feature of the cutoff regularization invalidates the model for temperature and baryon density values relevant to the phenomenology of heavyion collisions and compact stars. We show that the source of the problems stems from cutting off momentum modes in finite integrals depending on thermal distribution functions in the grand canonical potential. The problems go away when taking into account the full momentum range of those integrals. Explicit examples are worked out in the SU(2)-flavor version of the model.-
Descrição: dc.descriptionUniv Fed Santa Maria, Dept Fis, BR-97105900 Santa Maria, RS, Brazil-
Descrição: dc.descriptionUniv Fed St Catarina UFSC, Florianopolis, SC, Brazil-
Descrição: dc.descriptionUniv Estado Rio de Janeiro, Dept Fis Teor, BR-20550013 Rio De Janeiro, RJ, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista UNESP, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271,Bloco 2, BR-01140070 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista UNESP, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271,Bloco 2, BR-01140070 Sao Paulo, SP, Brazil-
Formato: dc.format10-
Idioma: dc.languageen-
Publicador: dc.publisherAmer Physical Soc-
Relação: dc.relationPhysical Review D-
???dc.source???: dc.sourceWeb of Science-
Título: dc.titleCausality violation and the speed of sound of hot and dense quark matter in the Nambu-Jona-Lasinio model-
Tipo de arquivo: dc.typelivro digital-
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