In this paper we demonstrate the arising of higher-derivative contributions to the effective action of electrodynamics on the base of generalized Julia-Toulouse mechanism and explicitly show that the complete effective action generated within this methodology is nonlocal.

We consider an extended QED with the addition of a dimension-five Lorentz-breaking coupling between spinor and gauge fields, involving a pseudo-tensor κ µνλρ . The specific form of the Lorentz violating coupling considered by us have been suggested in other works, and some of its consequences at the classical level were already studied. Here, we investigate the consequences of this specific form of Lorentz violation at the quantum level, evaluating the one loop corrections to the gauge field two-point function, both at zero and at finite temperature. We relate the terms that are generated by quantum corrections with the photon sector of the Standard Model Extension, discussing the possibility of establishing experimental bounds on k µνρσ . From the dispersion relations in the resulting theory, we discuss its consistency from the causality viewpoint.

The non-Abelian aether-like Lorentz-breaking term, involving triple and quartic self-coupling vertices, is generated from the non-Abelian generalization of the Lorentz-breaking extended QED including only a minimal spinor-vector interaction.This term is shown explicitly to be finite and non-ambiguous. I. INTRODUCTIONThe Lorentz symmetry breaking opens broad possibilities for constructing extensions of known field theory models. The first steps in this direction were presented in the paradigmatic papers by Kostelecky and Colladay [1,2]. In these papers a list of possible Lorentzbreaking extensions of the standard model has been presented for the first time. Further, many terms of this list were shown to arise as one-loop perturbative corrections. In the case of scalar, gauge and gravitational fields such terms arise from the corresponding fermionic determinants (for a review of various situations where such arising occurs, see [3]).However, absolute majority of these results describe Lorentz-breaking contributions of second order in fields -for example, Carroll-Field-Jackiw (CFJ) term, aether terms for scalar and gauge fields, higher-derivative contributions for gauge fields. At the same time, it is well known that many phenomenological interesting results are obtained in essentially non-Abelian gauge theories (the most interesting application of these theories consists certainly in studies of QCD and confinement) whose Lagrangian involves terms up to fourth order in fields.The first example of a non-Abelian Lorentz-breaking term is the non-Abelian CFJ term [4,5] which breaks the Lorentz symmetry but preserves the gauge symmetry. In [6], the * jroberto,

In this paper, we take into account the Gribov copies present in 3D Yang–Mills–Higgs theory with a constant vector background whose presence breaks the Lorentz symmetry. The constant vector background is introduced within the non-Abelian aether term. Here, we show that this term arises as a one-loop correction. The influence of the aether coupling constant on the system is treated afterwards. As a result, we find that for some values of it the theory can be driven from a nonperturbative regime to a perturbative one. In this paper, we work with the Higgs field in the fundamental representation and in the Landau gauge.

The fluids produced and transported to the surface by the production manifolds do not have the necessary conditions to be economically viable. Produced fluids consist of at least three fluid phases (oil, water, and gas), besides impurities and contaminants. Therefore, the well stream should be processed as soon as possible after bringing it to the surface. Separator vessels are among the main equipment used at surface production facilities, being responsible for the separation of the produced phases. This work focuses in studying the fluid dynamic behavior in a horizontal three-phase separator. For this, we used the computational fluid dynamics software ANSYS CFX. First, a detailed analysis of a "Standard Case" was performed to better understand the entire separation process within the vessel. The results showed the three phases through simulation time, an analysis of the separation efficiency, an analysis of the different fluids flow lines, an analysis of the pressure gradient inside the vessel, and an analysis of the effect of the diverter baffle, as well as, a variation of fluid flow at the inlet of the separator.