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I present the measurements, analysis and results obtained with the NA34 experiment at the CERN European laboratory, on the global characteristics of particle production in ultra-relativistic oxygen-nucleus collisions, at incident energies of 60 and 200 GeV/nucleon. The observed properties of the particle flow are analysed in the framework of phenomenological models inspired by quantum chromodynamics. From this analysis, novel information emerges concerning the mechanisms and space-time evolution of the soft-hadronic processes in short-lived extended volumes of matter at extreme densities and temperature. We consequently study the parameters and critical conditions under which nuclear collisions could allow the observation of a phase transition from hadronic matter towards a new state of deconfined quark-gluon plasma matter.

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Thesis (Ph.D.)--Tufts University, 2004. / Adviser: Krzysztof Sliwa. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 131-138). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

Thesis (M.Sc.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 2001? / Copies of author's previously published works inserted. Bibliography: p. 56-57.

Thesis (M.Sc.). / Written for the Dept. of Physics. Title from title page of PDF (viewed 2009/06/25). Includes bibliographical references.

Thesis (Ph. D.)--Rutgers University, 2007. / "Graduate Program in Physics and Astronomy." Includes bibliographical references (p. 96-100).

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 107-109). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph.D.)--Baylor University, 2006. / Includes bibliographical references (p. 118-122).

Orientador: Gastão Inácio krein / Coorientador: Bruno El-Bennich / Banca: Lauro Tomio / Banca: Juan Pablo Carlomagno / Banca: Sidney dos Santos Avancini / Banca: Kazuo Tsushima / Resumo: Nesta tese empregamos um modelo de interação de contato que preserva simetrias para estudar estrututura hadrônica e matéria de quarks. A interação de contato é uma representação de kernels não perturbativos usados em equações de Dyson-Schwinger e Bethe-Salpeter da Cromodinâmica Quântica (QCD). A ideia básica do modelo está baseada num esquema de subtração que evita passos tradicionais no cálculo de de integrais divergentes que invariavelmente levam a violações de simetrias. Em temperatura zero, as equações de Dyson-Schwinger equation para os propagadores dos quarks u; d; s and c são resolvidas e amplitudes de estado ligado de Bethe-Salpeter, que respeitam a invariância sob translações espaço-temporais e as identidades de Ward-Takahashi associadas com simetrias globais da QCD, são obtidas para calcular as massas e as constantes de decaimento eletrofracas dos mésons pseudoscalares π; K, D e Ds e dos mésons vetorias ρ, K*, D* e Ds*. As predições do modelo estão em bom acordo com dados experimentais e da QCD na rede. Em adição, estendemos o modelo para temperaturas diferentes de zero; neste caso, o problema de violação de simetrias está restrito apenas às partes puramente divergentes porque os termos que dependem das distribuições térmicas são finitas e não requerem regularização. Finalmente, investigamos a dependência com a temperatura das contribuições das flutuações quânticas quark-π e quark-σ aos coeficientes de transporte de viscosidade de cisalhamento η e volumétrica ζ e as... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: In thesis, a symmetry-preserving contact interaction model is used to study hadron structure and quark matter. The contact interaction is a representation of nonperturbative kernels used in Dyson-Schwinger and Bethe-Salpeter equations of Quantum Chromodynamics (QCD). The basic idea of the model is based on a subtraction scheme that avoids standard steps in the evaluation of divergent integrals that invariably lead to symmetry violation. At zero temperature, the Dyson-Schwinger equation is solved for the u; d; s and c quark propagators and the boundstate Bethe-Salpeter amplitudes respecting spacetime-translation invariance and the Ward-Green-Takahashi identities associated with global symmetries of QCD are obtained to calculate masses and electroweak decay constants of the pseudoscalar π; K, D and Ds and vector ρ, K*, D*, and Ds* mesons. The predictions of the model are in good agreement with available experimental and lattice QCD data. In addition, we extend the model to nonzero temperature; here, the problem of symmetry violation is associated only with the purely divergent parts because the effects due to the termal distributions are finite and do not need regularization. We compute the temperature dependence of the masses and decay constants of the pseudoscalar mesons considered here. Finally, we have investigated the temperature dependence of the contributions of quark-π and quark-σ quantum fluctuations to the transport coefficients of shear η and bulk ζ viscosities and t... (Complete abstract click electronic access below) / Doutor