135 research outputs found
Scarce fire activity in north and north-western Amazonian forests during the last 10,000 years
Des outils d'aide à la décision pour planifier des systèmes d’assainissement durables : une revue quantitative systématique
NordICC Trial Results in Line With Expected Colorectal Cancer Mortality Reduction After Colonoscopy:A Modeling Study
Consistency analysis of a nonbirefringent Lorentz-violating planar model
In this work analyze the physical consistency of a nonbirefringent
Lorentz-violating planar model via the analysis of the pole structure of its
Feynman propagators. The nonbirefringent planar model, obtained from the
dimensional reduction of the CPT-even gauge sector of the standard model
extension, is composed of a gauge and a scalar fields, being affected by
Lorentz-violating (LIV) coefficients encoded in the symmetric tensor
. The propagator of the gauge field is explicitly evaluated
and expressed in terms of linear independent symmetric tensors, presenting only
one physical mode. The same holds for the scalar propagator. A consistency
analysis is performed based on the poles of the propagators. The isotropic
parity-even sector is stable, causal and unitary mode for .
On the other hand, the anisotropic sector is stable and unitary but in general
noncausal. Finally, it is shown that this planar model interacting with a
Higgs field supports compactlike vortex configurations.Comment: 11 pages, revtex style, final revised versio
Stomatal behavior and components of the antioxidative system in coffee plants under water stress
Mineralogical and geochemical influences on sediment color of Amazon wetlands analyzed by visible spectrophotometry
Cytokine profile in Montenegro skin test of patients with localized cutaneous and mucocutaneous leishmaniasis
A experiência de uma família que vivencia a condição crônica por anemia falciforme em dois adolescentes
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