Black holes with a cosmological constant in bumblebee gravity

RV Maluf, JCS Neves - Physical Review D, 2021 - APS
In this work, we present black hole solutions with a cosmological constant in bumblebee
gravity, which provides a mechanism for the Lorentz symmetry violation by assuming a …

Consequences of a condensed matter realization of Lorentz-violating<? format?> QED in Weyl semi-metals

AG Grushin - Physical Review D—Particles, Fields, Gravitation, and …, 2012 - APS
In Lorentz violating quantum electrodynamics (QED) it is known that a radiatively induced<?
format?> Chern-Simons term appears in the effective action for the gauge field, which is …

New -even and Lorentz-violating nonminimal coupling in the Dirac equation

R Casana, MM Ferreira Jr, E Passos… - Physical Review D …, 2013 - APS
In this work, we propose a CPT-even and Lorentz-violating dimension-five nonminimal
coupling between fermionic and gauge fields, involving the CPT-even and Lorentz-violating …

A central potential with a massive scalar field in a Lorentz symmetry violation environment

RLL Vitória, H Belich - Advances in High Energy Physics, 2019 - Wiley Online Library
We investigate the behaviour of a massive scalar field under the influence of a Coulomb‐
type and central linear central potentials inserted in the Klein‐Gordon equation by modifying …

QED with minimal and nonminimal couplings: on the quantum generation of Lorentz-violating terms in the pure photon sector

G Gazzola, HG Fargnoli, APB Scarpelli… - Journal of Physics G …, 2012 - iopscience.iop.org
We consider an effective model formed by usual QED (minimal coupling) with the addition of
a nonminimal Lorentz-violating interaction (proportional to a fixed 4-vector b μ) which may …

Bare and induced Lorentz and CPT invariance violations in QED

J Alfaro, AA Andrianov, M Cambiaso… - … Journal of Modern …, 2010 - World Scientific
We consider QED in a constant axial vector background (Æther). Further Lorentz invariance
violations (LIV) might occur owing to radiative corrections. The phenomenology of this model …

On the Dirac oscillator subject to a Coulomb-type central potential induced by the Lorentz symmetry violation

RLL Vitória, H Belich - The European Physical Journal Plus, 2020 - Springer
We investigated the relativistic oscillator model for spin-1/2 fermionic fields, known as the
Dirac oscillator, in a background of breaking the Lorentz symmetry governed by a constant …

Feynman propagator for the nonbirefringent -even electrodynamics of the standard <?format ?>model extension

R Casana, MM Ferreira Jr, AR Gomes… - Physical Review D …, 2010 - APS
The CPT-even gauge sector of the standard model extension is composed of 19
components comprised in the tensor (KF) μ ν ρ σ, of which nine do not yield birefringence. In …

[HTML][HTML] Effective electromagnetic actions for Lorentz violating theories exhibiting the axial anomaly

A Gómez, A Martín-Ruiz, LF Urrutia - Physics Letters B, 2022 - Elsevier
The CPT odd contribution to the effective electromagnetic action deriving from the vacuum
polarization tensor in a large class of fermionic systems exhibiting Lorentz invariance …

[HTML][HTML] Radiative generation of the CPT-even gauge term of the SME from a dimension-five nonminimal coupling term

R Casana, MM Ferreira Jr, RV Maluf, FEP Dos Santos - Physics Letters B, 2013 - Elsevier
In this Letter we show for the first time that the usual CPT-even gauge term of the Standard
Model Extension (SME), in its full structure, can be radiatively generated, in a gauge …