84 citations · 603 across the 30 of their papers we have counts for
27 papers · 1 filter
Low-Energy Lorentz Invariance in Lifshitz Nonlinear Sigma Models
Pedro R. S. Gomes, M. Gomes
This work is dedicated to the study of both large- and perturbative quantum behaviors of Lifshitz nonlinear sigma models with dynamical critical exponent in 2+1 dimensions…
Competing interactions and the Lifshitz-type Nonlinear Sigma Model
Pedro R. S. Gomes, P. F. Bienzobaz, M. Gomes
We establish the equivalence between the continuum limit of the quantum spherical model with competing interactions, which is relevant to the investigation of Lifshitz points, and…
Chern-Simons terms in Lifshitz like quantum electrodynamics
Van Sérgio Alves, B. Charneski, M. Gomes +2
In this work the generation of generalized Chern-Simons terms in three dimensional quantum electrodynamics with high spatial derivatives is studied. We analyze the self-energy corr…
Dynamics of a Dirac Fermion in the presence of spin noncommutativity
A. F. Ferrari, M. Gomes, V. G. Kupriyanov +1
Recently, it has been proposed a spacetime noncommutativity that involves spin degrees of freedom, here called "spin noncommutativity". One of the motivations for such a constructi…
Braneworlds scenarios in a gravity model with higher order spatial three-curvature terms
F. S. Bemfica, M. Dias, M. Gomes +1
In this work we study a Horava-like five-dimensional model in the context of braneworld theory. To begin with, the equations of motion of such model are obtained and, within the re…
On Ward Identities in Lifshitz-like Field Theories
Pedro R. S. Gomes, M. Gomes
In this work, we develop a normal product algorithm suitable to the study of anisotropic field theories in flat space, apply it to construct the symmetries generators and describe…
Propagator in the Horava-Lifshitz gravity
F. S. Bemfica, M. Gomes
In this paper it is studied the propagator for the modified theory of gravity proposed by Ho\vrava. We first calculate the propagator in the case and show that the main poles…
Fourth order spatial derivative gravity
F. S. Bemfica, M. Gomes
In this work we study a modified theory of gravity that contains up to fourth order spatial derivatives as a model for the Horava-Lifshitz gravity. The propagator is evaluated and,…
On Higher Spatial Derivative Field Theories
Pedro R. S. Gomes, M. Gomes
In this work, we employ renormalization group methods to study the general behavior of field theories possessing anisotropic scaling in the spacetime variables. The Lorentz breakin…
Horava-Lifshitz modifications of the Casimir effect
A. F. Ferrari, H. O. Girotti, M. Gomes +2
We study the modifications induced by spacetime anisotropy on the Casimir effect in the case of two parallel plates. Nonperturbative and perturbative regimes are analyzed. In the f…
Coleman-Weinberg mechanism in a three-dimensional supersymmetric Chern-Simons-matter model
A. F. Ferrari, E. A. Gallegos, M. Gomes +4
Using the superfield formalism, we study the dynamical breaking of gauge symmetry in the N=1 three-dimensional supersymmetric Chern-Simons model, coupled to a complex scalar superf…
Noncommutativity due to spin
M. Gomes, V. G. Kupriyanov, A. J. da Silva
Using the Berezin-Marinov pseudoclassical formulation of spin particle we propose a classical model of spin noncommutativity. In the nonrelativistic case, the Poisson brackets betw…
Dynamical noncommutativity
M. Gomes, V. G. Kupriyanov, A. J. da Silva
The model of dynamical noncommutativity is proposed. The system consists of two interrelated parts. The first of them describes the physical degrees of freedom with coordinates q^1…
Scattering of spin 1/2 particles by the 2+1 dimensional noncommutative Aharonov-Bohm potential
A. F. Ferrari, M. Gomes, C. A. Stechhahn
In this work we study modifications in the Aharonov-Bohm effect for relativistic spin 1/2 particles due to the noncommutativity of spacetime in dimensions. The noncommutati…
The three-dimensional noncommutative Gross-Neveu model
B. Charneski, A. F. Ferrari, M. Gomes
This work is dedicated to the study of the noncommutative Gross-Neveu model. As it is known, in the canonical Weyl-Moyal approach the model is inconsistent, basically due to the se…
Lorentz symmetry breaking in the noncommutative Wess-Zumino model: One loop corrections
A. F. Ferrari, H. O. Girotti, M. Gomes
In this paper we deal with the issue of Lorentz symmetry breaking in quantum field theories formulated in a non-commutative space-time. We show that, unlike in some recente analysi…
The coupling of fermions to the three-dimensional noncommutative model: minimal and supersymmetric extensions
E. A. Asano, H. O. Girotti, M. Gomes +3
We consider the coupling of fermions to the three-dimensional noncommutative model. In the case of minimal coupling, although the infrared behavior of the gauge sector i…
Higher loop corrections in noncommutative supersymmetric QED
H. O. Girotti, M. Gomes, A. Yu. Petrov +2
This paper has been withdrawn by the authors. It has been superseded by hep-th/0309154
Spontaneous Symmetry Breaking in Noncommutative Field Theory
H. O. Girotti, M. Gomes, A. Yu. Petrov +2
The spontaneous symmetry breaking of rotational O(N) symmetry in noncommutative field theory is investigated in a 2+1 dimensional model of scalar fields coupled through a combinati…
The Three-Dimensional Noncommutative Nonlinear Sigma Model in Superspace
H. O. Girotti, M. Gomes, A. Yu. Petrov +2
We study the superspace formulation of the noncommutative nonlinear supersymmetric O(N) invariant sigma-model in 2+1 dimensions. We prove that the model is renormalizable to all or…
Superfield Effective Action in the Noncommutative Wess-Zumino Model
I. L. Buchbinder, M. Gomes, A. Yu. Petrov +1
We introduce the concept of superfield effective action in noncommutative N=1 supersymmetric field theories containing chiral superfields. One and two loops low-energy contribution…
The Noncommutative Supersymmetric Nonlinear Sigma Model
H. O. Girotti, M. Gomes, V. O. Rivelles +1
We show that the noncommutativity of space-time destroys the renormalizability of the 1/N expansion of the O(N) Gross-Neveu model. A similar statement holds for the noncommutative…
A Consistent Noncommutative Field Theory: the Wess-Zumino Model
H. O. Girotti, M. Gomes, V. O. Rivelles +1
We show that the noncommutative Wess-Zumino model is renormalizable to all orders of perturbation theory. The noncommutative scalar potential by itself is non-renormalizable but th…
Non-Abelian Aharonov-Bohm Scattering of Spin 1/2 Particles
M. Gomes, L. C. Malacarne, A. J. da Silva
We study the low energy regime of the scattering of two fermionic particles carrying isospin 1/2 and interacting through a non-Abelian Chern-Simons field. We calculate the one-loop…