51 citations · 347 across the 26 of their papers we have counts for
26 papers
Charting the different phases of Yang-Mills-Chern-Simons-Higgs theories
Daniel O. R. Azevedo, Gustavo P. de Brito, Philipe De Fabritiis +1
We explore Yang-Mills-Chern-Simons theories coupled to a Higgs-like field in the fundamental representation of quantized in linear covariant gauges in three Euclidean dimen…
Infrared gluon propagator in the Refined Gribov-Zwanziger scenario at one-loop order in the Landau gauge
Gustavo P. de Brito, Antonio D. Pereira
The Refined Gribov-Zwanziger (RGZ) action in the Landau gauge provides a local and renormalizable framework to account for the existence of infinitesimal Gribov copies in the path…
Ruling out models of vector dark matter in asymptotically safe quantum gravity
Gustavo P. de Brito, Astrid Eichhorn, Mads T. Frandsen +3
The nature of dark matter is a problem with too many potential solutions. We investigate whether a consistent embedding into quantum gravity can decimate the number of solutions to…
Quadratic gravity in analogy to quantum chromodynamics: Light fermions in its landscape
Gustavo P. de Brito
We investigate a non-perturbative approach to quantum gravity built in terms of analogies between quadratic gravity and quantum chromodynamics. This approach is based on a conjectu…
Fate of chiral symmetry in Riemann-Cartan geometry
Gustavo P. de Brito, Antonio D. Pereira, Arthur F. Vieira
We study the mechanism of chiral symmetry breaking for fermionic systems in a gravitational background with curvature and torsion. The analysis is based on a scale-dependent effect…
Towards a bound on the Higgs mass in causal set quantum gravity
Gustavo P. de Brito, Astrid Eichhorn, Ludivine Fausten
In the Standard Model of particle physics, the mass of the Higgs particle can be linked to the scale at which the Standard Model breaks down due to a Landau pole/triviality problem…
On the weak-gravity bound for a shift-symmetric scalar field
Gustavo P. de Brito, Benjamin Knorr, Marc Schiffer
The weak-gravity bound has been discovered in several asymptotically safe gravity-matter systems. It limits the strength of gravitational fluctuations that are compatible with an u…
Refined Gribov-Zwanziger theory coupled to scalar fields in the Landau gauge
Gustavo P. de Brito, Philipe De Fabritiis, Antonio D. Pereira
The Refined Gribov-Zwanziger (RGZ) action in the Landau gauge accounts for the existence of infinitesimal Gribov copies as well as the dynamical formation of condensates in the inf…
Higher-order curvature operators in causal set quantum gravity
Gustavo. P. de Brito, Astrid Eichhorn, Christopher Pfeiffer
We construct higher-order curvature invariants in causal set quantum gravity. The motivation for this work is twofold: first, to characterize causal sets, discrete operators that e…
Nonvanishing gravitational contribution to matter beta functions for vanishing dimensionful regulators
Gustavo P. de Brito, Astrid Eichhorn
We explore the effect of quantum gravity on matter within a Renormalization Group framework. First, our results provide an explicit example of how misleading conclusions can be dra…
Are there ALPs in the asymptotically safe landscape?
Gustavo P. de Brito, Astrid Eichhorn, Rafael R. Lino dos Santos
We investigate axion-like particles (ALPs) in the context of asymptotically safe gravity-matter systems. The ALP-photon interaction, which facilitates experimental searches for ALP…
The weak-gravity bound and the need for spin in asymptotically safe matter-gravity models
Gustavo P. de Brito, Astrid Eichhorn, Rafael Robson Lino dos Santos
We discover a weak-gravity bound in scalar-gravity systems in the asymptotic-safety paradigm. The weak-gravity bound arises in these systems under the approximations we make, when…
Can quantum fluctuations differentiate between standard and unimodular gravity?
Gustavo P. de Brito, Oleg Melichev, Roberto Percacci +1
We formally prove the existence of a quantization procedure that makes the path integral of a general diffeomorphism-invariant theory of gravity, with fixed total spacetime volume,…
Light charged fermions in quantum gravity
Gustavo P. de Brito, Astrid Eichhorn, Marc Schiffer
We study the impact of quantum gravity on a system of chiral fermions that are charged under an Abelian gauge group. Under the impact of quantum gravity, a finite value of the gaug…
Interesting features of a general class of higher derivative theories of quantum gravity
A. Accioly, J. de Almeida, G. P. de Brito +1
We investigate some classical and quantum aspects of a general class of higher derivative theories of gravity. We propose a generalized version of the so-called Teyssandier gauge c…
Renormalizability in -dimensional higher-order gravity
A. Accioly, J. de Almeida, G. P. de Brito +1
A simple expression for calculating the classical potential concerning -dimensional gravitational models is obtained through a method based on the generating functional. The pre…
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…
Effective models of quantum gravity induced by Planck scale modifications in the covariant quantum algebra
G. P. de Brito, P. I. C. Caneda, Y. M. P. Gomes +2
In this paper we introduce a modified covariant quantum algebra based in the so-called Quesne-Tkachuk algebra. By means of a deformation procedure we arrive at a class of higher de…
Lorentz violation in simple QED processes
G. P. de Brito, J. T. Guaitolini Junior, D. Kroff +2
We determine the effect of a CPT-even and Lorentz violating non-minimal coupling on the differential cross sections for some of the most important tree-level processes in QED, name…
Simple prescription for computing the nonrelativistic interparticle potential energy related to dual models
G. B. de Gracia, G. P. de Brito
Following a procedure recently utilized by Accioly et al. to obtain the D-dimensional interparticle potential energy for electromagnetic models in the nonrelativistic limit, and re…
Smooth braneworld models possibility in modified gravities
G. P. de Brito, J. M. Hoff da Silva, P. Michel L. T. da Silva +1
It is shown that the consideration of the braneworld consistency conditions within the framework of bulk modified gravities allows for the existence of thick branes in the five- di…
A method for obtaining thick branes models
A. de Souza Dutra, G. P. de Brito, J. M. Hoff da Silva
In this work we present a new class of braneworld models, where the superpotential function may be decomposed in a very specific form, but still embracing, which allows considerabl…
Multikink solutions and deformed defects
G. P. de Brito, A. de Souza Dutra
At the present work we consider an application of the deformation procedure that enable us to construct, systematically, scalar field models supporting multikinks. We introduce a n…
Orbit based procedure for doublets of scalar fields and the emergence of triple kinks and other defects
G. P. de Brito, A. de Souza Dutra
In this work we offer an approach to enlarge the number of exactly solvable models with two real scalar fields in (1+1)D. We build some new two-field models, and obtain their exact…