Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Colatto, L. P."'
A vector field coming from spontaneous Lorentz violation mechanism, namely Bumblebee model is analysed in a topological framework in a $(1+2)D$ Minkowski space-time. Taking a $(1+2)D$ nonlinear Bumblebee vector matter field dynamics where we include
Externí odkaz:
http://arxiv.org/abs/2007.12675
Autor:
Colatto, L. P., Penna, A. L. A.
In this paper we construct and study a formulation of a chargeless complex vector matter field in a supersymmetric framework. To this aim we combine two no-chiral scalar superfields in order to take the vector component field to build the chargeless
Externí odkaz:
http://arxiv.org/abs/1306.5038
Autor:
Rojas, M., De Andrade, M. A., Colatto, L. P., Matheus-Valle, J. L., De Assis, L. P. G., Helayel-Neto, J. A.
The main purpose of this work is to show that massless Dirac equation formulated for non-interacting Majorana-Weyl spinors in higher dimensions, particularly in D=1+9 and D=5+5, can lead to an interpretation of massive Majorana and Dirac spinors in D
Externí odkaz:
http://arxiv.org/abs/1111.2261
Publikováno v:
Eur.Phys.J.C62:425-432,2009
This paper deals with situations that illustrate how the violation of Lorentz symmetry in the gauge sector may contribute to magnetic moment generation of massive neutral particles with spin-1/2 and spin-1. The procedure we adopt here is based on Rel
Externí odkaz:
http://arxiv.org/abs/0806.1253
Taking a full 3D nonlinear vector matter field dynamics, a vector version of a soliton state was found. The Nielsen-Olesen procedure was used in order to derive a Lorentz-violation vector parameter which characterizes, via Spontaneous Symmetry Breaki
Externí odkaz:
http://arxiv.org/abs/hep-th/0610096
Publikováno v:
Phys.Rev. D73 (2006) 105007
In this paper we study the nonlocal effects of noncommutative spacetime on simple physical systems. Our main point is the assumption that the noncommutative effects are consequences of a background field which generates a local spin structure. So, we
Externí odkaz:
http://arxiv.org/abs/hep-th/0512266
Publikováno v:
Braz.J.Phys. 34 (2004) 526-530
We present a class of exact vacuum solutions corresponding to de Sitter and warm inflation models in the framework of scalar-tensor cosmologies. We show that in both cases the field equations reduce to planar dynamical systems with constraints. Then,
Externí odkaz:
http://arxiv.org/abs/hep-th/0312124
Publikováno v:
Eur.Phys.J. C36 (2004) 79-87
We consider a model with a charged vector field along with a Cremmer-Scherk-Kalb-Ramond (CSKR) matter field coupled to a U(1) gauge potential. We obtain a natural Lorentz symmetry violation due to the local U(1) spontaneous symmetry breaking mechanis
Externí odkaz:
http://arxiv.org/abs/hep-th/0310220
Autor:
Scarpelli, A. P. Baeta, Belich, H., Boldo, J. L., Colatto, L. P., Helayel-Neto, J. A., Nogueira, A. L. M. A.
The gauge-invariant Chern-Simons-type Lorentz- and CPT-breaking term is here re-assessed and issues like causality, unitarity, spontaneous gauge-symmetry breaking are investigated. Moreover, we obtain a minimal extension of such a system to a supersy
Externí odkaz:
http://arxiv.org/abs/hep-th/0305089
Publikováno v:
Phys.Rev. D68 (2003) 065030
Focusing on gauge degrees of freedom specified by a 1+3 dimensions model hosting a Maxwell term plus a Lorentz and CPT non-invariant Chern-Simons-like contribution, we obtain a minimal extension of such a system to a supersymmetric environment. We co
Externí odkaz:
http://arxiv.org/abs/hep-th/0304166