Non Linear Walecka Model
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Formação de ressonâncias delta em estrelas de nêutron com a mudança das constantes de acoplamento híperon-méson / Formation of delta resonances in neutron stars with changing of the hyperon-meson coupling constants
No presente trabalho investigamos os efeitos da mudança das constantes de acoplamento entre os híperons (D; L; S e X) e os mésons (s; w e r) tendo em vista sua aplicacação na estrutura de estrelas de nêutron. Para tanto, adotamos o modelo de Walecka não-linear numa aproximacão de campo médio.
Publicado em: 2011
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2. Transições de fase hádron-quark em estrelas de nêutrons
Recent advances on the field of high energy physics have enabled the study of matter under extreme conditions and, in this context, new states of matter are being discovered and speculated upon. Among these hypothetical states of matter is the one of deconfined quarks in high densities and/or temperatures. An environment with extreme densities and low temper
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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3. Radiatively induced non linearity in the Walecka model
We evaluate the effective potential for the conventional linear Walecka non perturbatively up to one loop. This quantity is then renormalized with a prescription which allows finite vacuum contributions to the three as well as four 1PI Green's functions to survive. These terms, which are absent in the standard relativistic Hartree approximation, have a logar
Brazilian Journal of Physics. Publicado em: 2010-12
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4. Waves in nuclear matter / Ondas na matéria nuclear
Assuming that nuclear matter can be treated as a perfect fluid, we study the propagation of perturbations in the baryon density. The equation of state is derived from a relativistic mean field model, which is a variant of the non-linear Walecka model. The expansion of the Euler and continuity equations of relativistic hydrodynamics around equilibrium configu
Publicado em: 2009
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5. Equations of state for mixed stars
We investigate the properties of mixed stars formed by hadronic and quark matter in beta-equilibrium described by appropriate equations of state (EOS) in the framework of relativistic mean-field theory. We use the non-linear Walecka model for the hadron matter and the MIT Bag and the Nambu-Jona-Lasinio models for the quark matter. The calculations were perfo
Brazilian Journal of Physics. Publicado em: 2004-09
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6. How reliable is the mean-field nuclear matter description for supporting chiral effective Lagrangians?
The link between non-linear chiral effective Lagrangians and the Walecka model description of bulk nuclear matter is questioned. This fact is by itself due to the Mean Field Approximation (MFA) which innuclear mater makes the picture of a nucleon-nucleon interaction based on scalar (vector) meson exchange equivalent to the description of a nuclear matter bas
Braz. J. Phys.. Publicado em: 2001-09