31 citations · 154 across the 19 of their papers we have counts for
12 papers · 1 filter
Investigations on Effective Electromagnetic and Gravitational Scenarios
M. G. Campos, L. P. R. Ospedal, J. A. Helayël-Neto
The work aims effective and low-dimensional systems. Some different contexts involving gravitational and electromagnetic interactions are investigated. The electromagnetic one appr…
Considerations on the modified Maxwell electrodynamics in the presence of an electric and magnetic background
M. J. Neves, Patricio Gaete, L. P. R. Ospedal +1
The properties of the modified Maxwell electrodynamics (ModMax) are investigated in presence of external and uniform electric and magnetic fields. We expand the non-linear theory a…
Considerations on anomalous photon and Z-boson self-couplings from the Born-Infeld weak hypercharge action
M. J. Neves, L. P. R. Ospedal, J. A. Helayël-Neto +1
We investigate the effects of the Born-Infeld action on the Abelian sector of the electroweak model. The consequence of this approach is the emergence of anomalous couplings in the…
Dispersion Relations in Non-Linear Electrodynamics and the Kinematics of the Compton Effect in a Magnetic Background
M. J. Neves, Jorge B. de Oliveira, L. P. R. Ospedal +1
Non-linear electrodynamic models are re-assessed in this paper to pursue an investigation of the kinematics of the Compton effect in a magnetic background. Before considering speci…
Effective theories and non-minimal couplings in low-dimensional systems
M. G. Campos, L. P. R. Ospedal
Dimensionality aspects of non-minimal electromagnetic couplings are investigated. By means of the Foldy-Wouthuysen transformation, we attain (non-)relativistic interactions related…
Quantum corrected gravitational potential beyond monopole-monopole interactions
G. P. de Brito, M. G. Campos, L. P. R. Ospedal +1
We investigate spin- and velocity-dependent contributions to the gravitational inter-particle potential. The methodology adopted here is based on the expansion of the effective act…
Supersymmetry with Central Charge: A Twofold Implementation
L. P. R. Ospedal, R. C. Terin
In this work, we analyze an extended supersymmetry with central charge and develop its superspace formulation under two distinct viewpoints. Initially, in the conte…
Supersymmetry and Fermionic Modes in an Oscillon Background
R. A. C. Correa, L. P. R. Ospedal, W. de Paula +1
The excitations referred to as oscillons are long-lived time-dependent field configurations which emerge dynamically from non-linear field theories. Such long-lived solutions are o…
Spin- and velocity-dependent non-relativistic potentials in modified electrodynamics
G. P. de Brito, P. C. Malta, L. P. R. Ospedal
We investigate the interparticle potential between spin-0, -1/2 and -1 sources interacting in modified electrodynamics in the non-relativistic regime. By keeping terms of $\mathcal…
Comparative aspects of spin-dependent interaction potentials for spin-1/2 and spin-1 matter fields
P. C. Malta, L. P. R. Ospedal, K. Veiga +1
This paper sets out to establish a comparative study between classes of spin- and velocity-dependent potentials for spin-1/2 and spin-1 matter currents/sources in the non-relativis…
Topologically Massive Spin-1 Particles and Spin-Dependent Potentials
F. A. Gomes Ferreira, P. C. Malta, L. P. R. Ospedal +1
We investigate the role played by particular field representations of an intermediate massive spin-1 boson in the context of spin-dependent interparticle potentials between fermion…
A 3-form Gauge Potential in 5D in connection with a Possible Dark Sector of 4D-Electrodynamics
D. Cocuroci, L. P. R. Ospedal, M. J. Neves +1
We here propose a 5-dimensional {\bf Abelian gauge} model based on the mixing between a potential and an Abelian 3-form field by means of a topological mass term. An extende…