Diagramas de fase para a matéria nuclear e de quarks

• Ano de defesa: 2011
• Autor(a) principal: Silva Filho, Odilon Lourenço da
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Programa de Pós-graduação em Física; Física
• Palavras-chave em Português: Modelos não lineares de Walecka; Modelos hadrônicos de contato; Limites não relativísticos; Transição líquido-gás; Termodinâmica das transições de fase; Fenomenologia da QCD; Hádron; Quarks; Cromodinâmica quântica; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://app.uff.br/riuff/handle/1/19120

In this work we analyze the predictions from a sef of nonlinear Walecka models on the nuclear matter and quarks phase diagrams. A comparison between the finite range hadronic models and the nonlinear point-coupling ones is also accomplished. In the latter, the use of the nonrelativistic limit shows how some Skyrme-type models can be obtained. In the moderate temperature regime, we construct the liquid-gas transition curves, scaled by the respective critical parameters, and investigate its model dependence as a function of the density. Through a study of the model spinodal curves, scaled by the flash parameters, a discussion on the system metastable regions is also performed. The nuclear incompressibility is also obtained as a function of the temperature in two distinct scenarios, the first where such quantity is calculated in a phase coexistence point, and the second in which the calculation is performed in a metastable region. For the construction of the hadron-quark phase diagrams, we use the hadronic models together with the interacting quark model, the PNJL one, that takes into account in its structure the (dynamical) confinement phenomenology through the Polyakov loop. For this model we describe all the termodynamics, and present its parametrizations, together with the analysis of the phase diagrams, generated by the PNJL model itself, in comparison with the hadron-quark diagrams generated from both models.