Now showing items 1-10 of 14
Exploring the properties of the pure spinor b ghost
(2014-08-07) [Tese de doutorado]
This thesis is based in part of my work during the Ph.D. and aims to present a detailed analysis of some newly studied properties of the composite non-minimal pure spinor b ghost. First, a review of the minimal and non-minimal ...
New physics from warped compact extra dimensions: from model building to colliders signals
(2014-06-03) [Tese de doutorado]
The Higgs field of the Standard Model theory for elementary particles and interactions can be realized as a composite state from an underlying strong sector. Such hypothesis is very attractive as an ultraviolet completion ...
Simetria discreta 'S IND. 3' como uma possível extensão para o Modelo Padrão
(2014-07-18) [Dissertação de mestrado]
A new phase of measures for the mixing angles for the lepton sector began. The latest data for the value of 'teta IND. 3' excluded its null value in more than '10 IND. 'sigma'', then discarding the TBM mixing matrix of ...
Dynamical gluon masses in perturbative calculations at loop level: towards an effective loop expansion for quantum chromodynamics
(2014-12-16) [Tese de doutorado]
This thesis is based on part of the work done during the Ph.D., and it concerns the two distinguished domains of Quantum Chromodynamics (QCD) at zero temperature: the low-energy, confined domain, and the high-energy, ...
Application of open string ?eld theory to the in?ationary scenario
(2014-04-28) [Dissertação de mestrado]
This thesis consists in a review of the String Field Theory framework, focusing in the classical properties of the open sector and its possible applications for in?ation. Therefore, we intend to follow the Witten’s ...
Momento de dipolo elétrico do nêutron no modelo 3-3-1
(2014-03-10) [Dissertação de mestrado]
We analyse the neutron electric dipole moment in the 3-3-1 model with heavy leptons. We compare the theoretical predictions of this model with the actual experimental limits and give limits to some of its parameters
Aspectos Clássicos da Eletrodinâmica de Podolsky
(2014-04-29) [Dissertação de mestrado]
The Generalized Electrodynamics was developed by Boris Podolsky in 1942 and it is a generalization of Maxwell’s theory where Podolsky added a new term to the Maxwell’s Lagrangean with a second derivative of the electromagnetic ...
Dinâmica das transições quiral e de desconfinamento da cromodinâmica quântica com o modelo Polyakov-Nambu-Jona-Lasinio
(2014-03-27) [Dissertação de mestrado]
Thermodynamic equilibrium and non-equilibrium properties of the light u and d quarks sector of Quantum Chromodynamics (QCD) are studied with the Polyakov–Nambu–Jona-Lasinio (PNJL) model. The PNJL model allows to take into ...
Estrutura simplética para teorias de spin alto pela descrição de twistors
(2014-04-11) [Dissertação de mestrado]
We write a symplectic form on higher spin theories using twistor description. Our approach follows from Penrose’s equations, and our results seem to suggest an action di?erent from Fronsdal theory. Di?erences between the ...
Constantes de Movimento para o Modelo Sinh-Gordon Supersimétrico N = 1 com Defeito
(2014-02-26) [Dissertação de mestrado]
From the generators of the Kac-Moody superálgebra 's TIL'l(2,1) write the Lax pair for the supersymmetric sinh-Gordon model. In addition, we ?nd that through the zero curvature obtained the Lax equation reproduces the ...