Symmetry Breaking Physics
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. A natureza tricrítica da fase nemática
The phenomenona of critical phases are very important topic of conceptual point of view, mainly by breaking paradigms of modern theories of critical phenomena. These phenomena can be suggested by mechanisms of spontaneous breaking of continumm symmetry - well established model in particle physics - where there is the appearance of Nambu-Goldstone Bosons lead
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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2. Sinais de produção de novos bósons vetoriais no LHC / Signals of production of new vector bosons at the LHC
In this work we performed a phenomenological observation of new spin-1 bosons associated with the Electroweak Symmetry Breaking sector. As motivation for this analysis we previously studied the special case of models based on the mechanism of Eletroweak Symmetry Breaking via Boundary Conditions, which also have a tower vector of Kaluza-Klein bosons ensuring
Publicado em: 2009
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3. Quebra da simetria eletrofraca e uma quarta geração / Electroweak symmetry breaking and a fourth generation
O modelo padrão da física de partículas descreve com sucesso as interações eletrofracas e fortes da natureza, pois suas previsões estão de acordo com os dados experimentais. Nesse trabalho estudamos a fenomenologia desse modelo para aprodução de léptons da quarta geração. Argumentamos que embora as seções de choque para esses processos sejam pe
Publicado em: 2009
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4. Lorente symmetry breaking and chern-simons term in (3+1) dimensions / Quebra da simetria de Lorentz e o termo de Chern-Simons em (3+1) dimensões
In this dissertation, we studied the Chern-Simons model in the gauge and the gravitation theories. So, we study the problem of fermions interacting, in a first moment, with a electromagnetic field and in a second moment, with a gravitational field. We introduced in the interaction lagragian, for both cases, a background field which break the Lorentz symmetry
Publicado em: 2009
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5. Symmetry breaking and quantum phase transition in spin-boson models / Quebra de simetria e transição de fase quantica em alguns modelos de acoplamento spin-boson
Neste trabalho estudamos o efeito sobre a Transição de Fase Quântica (TFQ) do Modelo de Dicke Integrável devido a adição de um pequeno termo (fixo) de interação de dois bósons na Aproximação de Onda Girante (RWA). Mostramos que, embora a descontinuidade na derivada da energia do Estado Fundamental (EF) como função do parâmetro principal de inte
Publicado em: 2008
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6. Asymmetries in the littlest Higgs model
Little Higgs models were recently proposed as an alternative for models of electroweak symmetry breaking. They can be regarded as one of the important candidates of the new physics beyond the Standard Model. We consider here the phenomenology of the minimal model of this type, the "Littlest Higgs Model" (LHM). It predicts the existence of the new gauge boson
Brazilian Journal of Physics. Publicado em: 2007-07
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7. Condensation of vortex-strings: effective potential contribution through dual actions
Topological excitations are believed to play an important role in different areas of physics. For example, one case of topical interest is the use of dual models of quantum cromodynamics to understand properties of the vacuum and confinement through the condensation of magnetic monopoles and vortices. Other applications are related to the role of these topol
Brazilian Journal of Physics. Publicado em: 2007-03
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8. QCD Green functions and their application to hadron physics
In a functional approach to QCD the infrared behaviour of Landau gauge Green functions is investigated. It can be proven that the ghost Dyson-Schwinger equation implies the Gribov-Zwanziger horizon condition. Its relation to the Kugo-Ojima confinement scenario is elucidated. Positivity violation for gluons is demonstrated, and the analytic structure of the g
Brazilian Journal of Physics. Publicado em: 2007-03
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9. Parameter symmetry in ferromagnetic superconductors / Simetria do parametro de ordem em supercondutores ferromagneticos
In this dissertation, we present a study of the order-parameter symmetry in ferromagnetic superconductors. Our approach is inspired on the Landau Theory of Phase Trasition or, more precisely, on the idea that a second order phase transition is a symmetry breaking process where the ordered phase of the system is described by a subgroup of the highly symmetric
Publicado em: 2007
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10. Structural and dynamical properties of a quasi-onedimensional classical binary system / Estudo das propriedades estruturais e dinÃmicas de um sistema binÃrio quasi-unidimensional.
The aim of this work is to study the structural and dynamical properties of a classical binary system of charged particles confined in a two dimensional channel. Such a system is described in the literature as quasi-unidimensional, and its relevance is supported by the possibility of technological applications, shown recently in the scientific literature, an
Publicado em: 2007
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11. Análise dos efeitos da temperatura nos acoplamentos de modelos escalares O(N) x O(N)
The aim of this work is to analyse how the counter intuitive phenomena known as Symmetry Non Restoration and Inverse Symmetry Breaking manifest themselves within multi scalar field theories displaying O(N)O(N) symmetry. Both, the relativistic as well as the non relativistic versions of such models are investigated here. For the relativistic case, which is im
Publicado em: 2005
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12. O estudo de mapas equivariantes sob a ação do grupo octaédrico: um sistema dinâmico para a evolução do código genético. / Study of equivariants maps under octahedral group action: a dynamic system for the evolution of the genetic code.
The study of natural symmetry breaking processes have attracted interest in many physics areas including energy atoms studies in quantum physics as well elementary particles in high energy physics. These processes were related with microscpics physic systems, in 1993 appears one propose to use the ideas of symmetry breaking in one macroscopic system the gene
Publicado em: 2002