Modelo térmico em colisões nucleares em altas energias

• Ano de defesa: 2010
• Autor(a) principal: Hirsch, Luciana Rocha
• 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: Colisão; Colisão entre íon pesado; Estatística termodinâmica; Estranheza; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://app.uff.br/riuff/handle/1/19339

This thesis examines heavy ion collisions at high available energies in the center of mass for values up √s = 200 GeV. The analysis was made from one model that belongs to the Thermal Models category. These models use a thermodynamic and statistic approach to fit the experimental data obtained from hadrons populations produced after collisions. Such models based on adjusting the parameters temperature, T, and baryochemical potential, mb, the system, when it reaches the state balance known as freeze-out. From a set with about 20 different collisions, we obtained our own values for parameterizations of mb, as a √s function. Besides these two adjustable parameters, this model allows us to infer a number of other system features such as densities of all types of particles, variables thermodynamics, as energy, pressure, entropy and volume. The volume of the system formed after the collision is a quantity considered important for a better understanding of quark-gluon plasma, as well as strangeness, both are included in the model. Moreover, the volume and the strangeness are considered important for a better understanding of the QGP, and both are included in own model. We also find results preliminary as a function of the collision centrality. We present our results with regard to the above, as well as their implications and future possibilities opened by this thesis.