109 citations · 1.5k across the 70 of their papers we have counts for
37 papers · 1 filter
Topologically induced deformations of differential forms
J. M. Hoff da Silva, J. M. B. Matzenbacher, R. da Rocha
Motivated by deformations of spin structures and their geometric implications, we study a deformed exterior derivative, which is a third-order nilpotent operator. This higher-order…
Non-standard Wigner doublets
F. A. da Silva Barbosa, J. M. Hoff da Silva
Guided by a conservative formulation in investigating the physical content of quantum fields, we explore non-standard Wigner classes of particles that could provide the basis for s…
Irreducible representations of the inhomogeneous Lorentz group with two-fold Wigner degeneracy
Dharam Vir Ahluwalia, G. B. de Gracia, Julio M. Hoff da Silva +2
Not all complete set of spinors can be used as expansion coefficients of a quantum field. In fact, Steven Weinberg established the uniqueness of Dirac spinors for this purpose prov…
Revisiting Takahashi's inversion theorem in discrete symmetry-based dual frameworks
R. J. Bueno Rogerio, R. T. Cavalcanti, J. M. Hoff da Silva +1
The so-called Takahashi's \emph{Inversion Theorem}, the reconstruction of a given spinor based on its bilinear covariants, are re-examined, considering alternative dual structures.…
Emergent spinor fields from exotic spin structures
J. M. Hoff da Silva, R. da Rocha
The classification of emergent spinor fields according to modified bilinear covariants is scrutinized, in spacetimes with nontrivial topology, which induce inequivalent spin struct…
Spinorial discrete symmetries and adjoint structures
J. M. Hoff da Silva, R. J. Bueno Rogerio, N. C. R. Quinquiolo
Extending the investigations about the theory of duals, we analyze duals built up with the aid of discrete symmetry operators. We scrutinize algebraic and physical constraints (enc…
Regular spinors and fermionic fields
R. J. Bueno Rogerio, J. M. Hoff da Silva, C. H. Coronado Villalobos
Bearing in mind the Lounesto spinor classification, we connect the expansion coefficients of well behaved fermionic quantum field, i.e., a local field within a full Lorentz covaria…
Exotic fermionic fields and minimal length
J. M. Hoff da Silva, D. Beghetto, R. T. Cavalcanti +1
We investigate the effective Dirac equation, corrected by merging two scenarios that are expected to emerge towards the quantum gravity scale. Namely, the existence of a minimal le…
Mass dimension one fermions at 1-loop
G. P. de Brito, J. M. Hoff da Silva, V. Nikoofard
We investigate 1-loop contributions to the 2- and 4-point correlation functions within a theory for fermions with mass dimension one with a simple quartic self-interaction term. Th…
Opening the Pandora's box of quantum spinor fields
L. Bonora, J. M. Hoff da Silva, R. da Rocha
Lounesto's classification of spinors is a comprehensive and exhaustive algorithm that, based on the bilinears covariants, discloses the possibility of a large variety of spinors, c…
Effective lagrangian for a mass dimension one fermionic field in curved spacetime
R. J. Bueno Rogerio, J. M. Hoff da Silva, M. Dias +1
In this work we use momentum-space techniques to evaluate the propagator for a spin mass dimension one spinor field on a curved Friedmann-Robertson-Walker s…
Casimir effect for Elko fields
S. H. Pereira, J. M. Hoff da Silva, Rubia dos Santos
The Casimir effect for {mass dimension one fermion fields (sometimes called Elko)} in dimension is obtained using Dirichlet boundary conditions. It is shown the existence of…
On the bilinear covariants associated to mass dimension one spinors
J. M. Hoff da Silva, C. H. Coronado Villalobos, R. J. Bueno Rogerio +1
In this paper we approach the issue of Clifford algebra basis deformation, allowing for bilinear covariants associated to Elko spinors which satisfy the Fierz-Pauli-Kofink identiti…
A framework to a mass dimension one fermionic sigma model
R. J. Bueno Rogerio, J. M. Hoff da Silva, S. H. Pereira +1
In this paper a mass dimension one fermionic sigma model, realized by the eigenspinors of the charge conjugation operator with dual helicity (Elko spinors), is developed. Such spin…
The local vicinity of spins sum for certain mass dimension one spinors
R. J. Bueno Rogério, J. M. Hoff da Silva
It is well known that the usual formulation of Elko spinor fields leads to a subtle Lorentz symmetry break encoded in the spin sums. Recently it was proposed a redefinition in the…
Effective action for a quantum scalar field in warped spaces
J. M. Hoff da Silva, E. L. Mendonça, E. Scatena
We investigate the one-loop corrections at zero, as well as finite temperature, of a scalar field taking place in a braneworld motived warped background. After to reach a well defi…
Refining thick brane models via electroweak data
A. E. R. Chumbes, J. M. Hoff da Silva, M. B. Hott
After discussing the localization of Abelian and non-Abelian gauge fields and Higgs fields on a thick brane, we introduce a procedure of dimensional reduction and its consequences…
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…
Hawking Radiation from Elko Particles Tunnelling across Black Strings Horizon
Roldao da Rocha, J. M. Hoff da Silva
We apply the tunnelling method for the emission and absorption of Elko particles in the event horizon of a black string solution. We show that Elko particles are emitted at the exp…
Smooth thick braneworlds and the Gibbons-Kallosh-Linde no-go theorem
Marco Dias, J. M. Hoff da Silva, Roldão da Rocha
After working out the so called braneworld sum rules formalism in order to encompass Gauss-Bonnet terms, the generation of thick branes is proposed, even with a periodic extra dime…
VSR symmetries in the DKP algebra: the interplay between Dirac and Elko spinor fields
R. T. Cavalcanti, J. M. Hoff da Silva, Roldao da Rocha
VSR symmetries are here naturally incorporated in the DKP algebra on the spin-0 and the spin-1 DKP sectors. We show that the Elko (dark) spinor fields structure plays an essential…
Regular Bulk Solutions and Black Strings from Dynamical Braneworlds with Variable Tension
D. Bazeia, J. M. Hoff da Silva, Roldao da Rocha
Regular black strings solutions associated to a dynamical Friedmann-Robertson-Walker braneworld are obtained as a particular case of a regular bulk metric, in the context of a vari…
Exact solutions to Elko spinors in spatially flat Friedmann-Robertson-Walker spacetimes
J. M. Hoff da Silva, S. H. Pereira
In this paper we present exact solutions to the so-called Elko spinors for three models of expanding universe, namely the de Sitter, linear and the radiation type evolution. The st…