Efeitos da equação de estado em hidrodinâmica relativística através de alguns observáveis

• Ano de defesa: 2014
• Autor(a) principal: Dudek, Danuce Marcele [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Equações de estado; Hidrodinâmica; Relatividade (Fisica); Plasma de quarks e glúons; Física nuclear; Partículas (Física nuclear); Equations of state
• Link de acesso: http://hdl.handle.net/11449/123975; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/22-05-2015/000829075.pdf

We present results of a systematic study of the role of the equation of state in the hydrodynamic model. We simulate Au+Au collisions for two energies of the Relativistic Heavy Ion Collider (RHIC), 130 and 200 GeV per nucleon, in order to compare our results to the collider data. By using the same initial conditions and freeze-out scenario, we analysed the effects of different equations of state on some physical observables trough the results of their respective hydrodynamical evolution. The observables of interest investigate here are particle spectra, elliptic flow, used to study the impact of the equations of state on final state anisotropies, and radii parameters estimated by the Hambury-Brown-Twiss effect (HBT). Three different types of equation of state are studied, each focusing on different features of the system, such as the nature of the phase transition, strangeness and baryon densities. These different equations of state imply different hydrodynamic responses on the observables. Although the three equations of state used in the calculations describe the data reasonably well, some small differences are observed, showing weak sensitivity of the results on the particular choice of equation of state