Four Fermion Model
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Desconstrução dimensional e violação de sabor / Dimensional desconstruction and flavor violation
The Standard Model of elementary particles describes the electroweak and strong interactions, and its predictions have successfully matched existing experimental data. However, there are some issues that are not addressed by this model, such as the gauge hierarchy problem and the origin of fermion masses. Both problems can be solved naturally using Warped Ex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/09/2011
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2. Espectro de excitação para modelos de teorias quânticas de campo na rede: modelos puramente fermiônicos e modelos de cromodinâmica quântica / Excitation spectrum for quantum field theory models on the lattice: pure fermionic models and quantum chromodynamics models
In this thesis, we obtain, from a mathematically rigorous point of view, the low-lying energy-momentum spectrum of two $3+1$ dimensional imaginary time lattice quantum filed theory with fermion fields (we give explicit results for the case $d = 3$ and Dirac matrices): a pure fermionic model with quartic interaction in the $N$-component fermion field and a qu
Publicado em: 2008
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3. Physics Beyond Standard Model in Theories with Extra Dimensons / "Física além do modelo padrão em teorias com dimensões extras"
The goal of this dissertation is to study theories that use extra dimensions to solve the problems that appear in the Standard Model at energies of the order 1 TeV. Specifically, we worked with models with more than 4 dimensions, where the spatial dimensions are compactified in an S1/Z2 orbifold. The Standard Model agrees to a great degree with the experimen
Publicado em: 2007
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4. Dynamical symmetry restoration for a higher-derivative four-fermion model in an external electromagnetic field
A four-fermion model with additional higher-derivative terms is investigated in an external electromagnetic field. The effective potential in the leading order of large-N expansion is calculated in external constant magnetic and electric fields. It is shown that, in contrast to the former results concerning the universal character of "magnetic catalysis" in
Brazilian Journal of Physics. Publicado em: 2000