Supersymmetry
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Testes de aspectos do modelo supersimétrico por meio da interação de neutrinos de altíssimas energias com a Terra / Indirect probes of superymmetry breaking with meutrino telescopes
O principal objetivo deste trabalho é propor testes para alguns aspectos do modelo padrão supersimétrico mínimo (MSSM), proposto como extensão do modelo padrão de física de partículas. Mais especificamente, testamos cenários de quebra de supersimetria mediada por interações de calibre (gauge). Mostramos como determinar limites para a escala de que
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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2. Cordas em espaços deformados / Strings in deformed space
In this thesis we studied rotating and oscillating strings under the AdS/CFT correspondence. These strings move in the AdS5 × S5, Lunin and Maldacena, R1, 9 and deformed R1, 9 spaces. In the case of the rotating string, the giant magnon and the spiky string were determined. In the case of the oscillating string, we found the solutions fo the classical equat
Publicado em: 2009
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3. Gauge symmetry breaking in the supersymmetric Chern-Simons model / Quebra de simetria de calibre no modelo de Chern-Simons supersimétrico
Através do formalismo de supercampos, estudamos as propriedades ultravioletas da eletrodinâmica quântica supersimétrica no espaço-tempo tridimensional. Mostramos que esta teoria é finita em todas as ordens de perturbação num calibre particular. Também apresentamos uma análise perturbativa do modelo de Chern-Simons supersimétrico acoplado a um supe
Publicado em: 2008
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4. Supersimetria em fisica de particulas / Supersymmetry in particle physics
O modelo padrão das partículas elementares, baseado na invariância de Lorentz e na simetria de gauge SU(3)c Ä SU(2)L Ä U(1)Y, foi confirmado por todos os testes experimentais até o momento. No entanto, nada nos garante que é este o modelo final das interações fundamentais. Problemas teóricos como a hierarquia, o número de gerações de partículas
Publicado em: 2007
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5. "Branas em supergravidade" / Branes in supergravity
This work intends to review the brane solutions of supergravity and contains a datailed deduction of the extremal and black solutions. In order to provide some motivations to the choices through the calculation, this work includes a brief review of some concepts from string theory and supersymmetry. This review will enable us to relate the supergravity solut
Publicado em: 2006
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6. Determinism and a supersymmetric classical model of quantum fields
A quantum field theory is described which is a supersymmetric classical model. Supersymmetry generators of the system are used to split its Liouville operator into two contributions, with positive and negative spectrum, respectively. The unstable negative part is eliminated by a positivity constraint on physical states, which is invariant under the classical
Brazilian Journal of Physics. Publicado em: 2005-06
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7. Search for supersymmetry at the LHC
It is generally accepted that the LHC is the accelerator facility at which weak scale supersymmetry will either be discovered or definitely excluded. I give a brief introduction to weak scale supersymmetry presenting the general argument that limit the supersymmetrical spectrum to be below TeV energies. We will see that the LHC is able to search for supersym
Brazilian Journal of Physics. Publicado em: 2004-12
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8. Collider tests for neutrino mass generation in a supersymmetric world with R-parity violation
We summarize the low energy features of a supersymmetric class of models with bilinear R-parity violation. We analyze two cases where the supersymmetry breaking is mediated either by supergravity or by anomaly induced contributions to the soft parameters and compare both scenarios in the context of recent neutrino conversion data and collider physics. We sho
Brazilian Journal of Physics. Publicado em: 2004-03
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9. Vector supersymmetry of Chern-Simons theory at finite temperature
The existence of the vector supersymmetry is analysed within the context of the finite temperature Chern-Simons theory.
Brazilian Journal of Physics. Publicado em: 2000-06
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10. Exterior gauging of an internal supersymmetry and SU(2/1) quantum asthenodynamics
A formally unitary Lagrangian model gauging an internal supersymmetry is proposed. The even subalgebra is gauged as a Yang-Mills theory, while the odd generators are gauged—according to Freedman's method—by skew tensor fields, equivalent dynamically to scalar Higgs fields. Chiral fermions are incorporated by following Townsend's construction and form irr
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11. Superconnections and internal supersymmetry dynamics.
In previous papers we proposed a theory of internal supersymmetry using the superalgebra su(n/1) to give rise to a unified structure that included quarks and leptons in 2n-5 generations. In the present paper we suggest that the notion of superconnections as introduced by Quillen provides a natural setting for the dynamics of an internally supersymmetric theo
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12. On the automorphism group of the conformal superalgebra
There is no automorphism of the conformal superalgebra that induces PT (parity and time reversal) on space time. Those conformal transformations that induce PT must change the sign of the odd brackets. In particular, in any implementation of conformal supersymmetry, CP can preserve but CPT must (at best) reverse the sign of the odd brackets (C, charge conjug