Buscar
Mostrando ítems 1-10 de 19
Lorentz-violating dilatations in momentum space and some extensions on nonlinear actions of Lorentz-algebra-preserving systems
(Amer Physical Soc, 2007-03-01)
We work on some general extensions of the formalism for theories which preserve the relativity of inertial frames with a nonlinear action of the Lorentz transformations on momentum space. Relativistic particle models ...
Attitude stabilization of a rigid spacecraft in the geomagnetic field
(Elsevier B.V., 2007-01-01)
An analytical method is proposed to study the attitude stability of a triaxial spacecraft moving in a circular Keplerian orbit in the geomagnetic field. The method is developed based on the electrodynamics effect of the ...
No radiative generation of Chern-Simons-like term in Lorentz-violating QED: dealing with IR divergences
(Journal of High Energy Physics, 2018)
Two field BPS solutions for generalized Lorentz breaking models
(American Physical Soc, 2006-10-01)
In this work we present nonlinear models in two-dimensional space-time of two interacting scalar fields in the Lorentz and CPT violating scenarios. We discuss the soliton solutions for these models as well as the question ...
Gravitation and the local symmetry group of space-time
(Kluwer Academic/plenum Publ, 2002-04-01)
According to general relativity, the interaction of a matter field with gravitation requires the simultaneous introduction of a tetrad field, which is a field related to translations, and a spin connection, which is a field ...
Integrability and conformal symmetry in higher dimensions: A model with exact hopfion solutions
(2002-11-11)
We use ideas on integrability in higher dimensions to define Lorentz invariant field theories with an infinite number of local conserved currents. The models considered have a two-dimensional target space. Requiring the ...
Constantes de Movimento para um Potencial Dependente da Velocidade
(Sociedade Brasileira de Física, 2002-09-01)
Simetrias geométricas contínuas para um sistema fechado de partículas são investigadas. Por suposto, as interações são deriváveis de uma função potencial dependente das velocidades das partículas. Tanto os vínculos sobre ...
Spacetime algebraic skeleton
(Iop Publishing Ltd, 2003-01-01)
The cosmological constant is shown to have an algebraic meaning: it is essentially an eigenvalue of a Casimir invariant of the Lorentz group acting on the spaces tangent to every spacetime. This is found in the context of ...
Confinement of fermions by mixed vector-scalar linear potentials in two-dimensional space-time
(Elsevier B.V., 2002-12-02)
The problem of confinement of fermions in 1 + 1 dimensions is approached with a linear potential in the Dirac equation by considering a mixing of Lorentz vector and scalar couplings. Analytical bound-states solutions are ...
Confinement of spinless particles by Coulomb potentials in two-dimensional space-time
(Elsevier B.V., 2005-10-10)
The problem of confinement of spinless particles in 1 + 1 dimensions is approached with a linear potential by considering a mixing of Lorentz vector and scalar couplings. Analytical bound-states solutions are obtained when ...