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243 papers · 1 filter
A novel nonlocal spin-1/2 theory: classical and quantum aspects
J. R. Nascimento, Gonzalo J. Olmo, A. Yu. Petrov +2
We propose a novel nonlocal spin-1/2 theory in which the form factor depends on the Dirac operator rather than on the d'Alembert operator. In this scenario, we explore some classic…
Inflation in non-local hybrid metric-Palatini gravity
Flavio Bombacigno, Mariaveronica De Angelis, Carsten van de Bruck +1
Within the framework of hybrid metric-Palatini gravity, we incorporate non-localities introduced via the inverse of the d'Alembert operators acting on the scalar curvature. We anal…
One-loop radiative corrections in bumblebee-Stueckelberg model
Fernando M. Belchior, Roberto V. Maluf
This work aims to study the radiative corrections in a vector model with spontaneous Lorentz symmetry violation, known in the literature as the bumblebee model. We consider such a…
Lorentz-violating extension of scalar QED at finite temperature
M. C. Araújo, J. Furtado, R. V. Maluf
In this work, we calculate the one-loop self-energy corrections to the gauge field in scalar electrodynamics modified by Lorentz-violating terms within the framework of the standar…
Vacuum polarization and induced Maxwell and Kalb-Ramond effective action in very special relativity
Roberto V. Maluf, Gonzalo J. Olmo
This work investigates the implications of very special relativity (VSR) on the calculation of vacuum polarization for fermions in the presence of Maxwell and Kalb-Ramond gauge fie…
On metric-affine bumblebee model coupled to scalar matter
J. R. Nascimento, Gonzalo J. Olmo, A. Yu. Petrov +1
We consider the coupling of the metric-affine bumblebee gravity model to scalar matter and calculate the lower-order contributions to two-point functions of bumblebee and scalar fi…