18 papers
Nonlocal four-fermion theory
F. M. Belchior, J. R. Nascimento, A. Yu. Petrov +1
The paper develops a nonlocal four‑fermion quantum field theory where the Dirac operator is modified by an entire nonlocal form factor, derives the mean‑field effective action and…
One-loop contributions in Lorentz-violating scalar QED with nonminimal coupling
F. M. Belchior, J. R. Nascimento, A. Yu. Petrov +1
In the context of pertubative aspects of Lorentz-violating theories, we study the divergent one-loop two-point functions of a Lorentz-violating (LV) extension of scalar QED contain…
Nonlocal Rarita-Schwinger theory
Fernando M. Belchior, Roberto V. Maluf
In this paper, one constructs a nonlocal extension of the Rarita-Schwinger theory for spin- fermions. Two classes of analytic form factors are considered: scalar form factors…
Shadow, acoustic redshift, and transfer observables of Lorentz-violating rotating acoustic black holes
Fernando M. Belchior, Edilberto O. Silva
We develop an impact-parameter-resolved transfer analysis for the rotating acoustic black hole with Lorentz symmetry violation. The background is the -dimensional Lorentz-vi…
Hairy Kiselev black hole with quintessential matter: themodynamic properties, sparsity of Hawking radiation, and greybody factors
Faizuddin Ahmed, Fernando M. Belchior, Allan R. P. Moreira +1
In this work, we investigate the thermodynamic properties, Hawking-radiation sparsity, and greybody-factor bounds of a hairy Kiselev black hole surrounded by a quintessential fluid…
Geodesics and Thermodynamics of a Schwarzschild Black Hole with Hernquist Dark Matter
A. R. P. Moreira, A. Bouzenada, F. M. Belchior +1
In this work, we investigate the physical and geometrical properties of a Schwarzschild black hole (BH) immersed in a Hernquist dark matter halo. To accomplish our purpose, one bui…