20 citations · 48 across the 10 of their papers we have counts for
10 papers
Background gravitational waves as signature of the adiabatic expansion of a black body that represents the dark universe
Cláudio Nassif Cruz, A. C. Amaro de Faria
We propose a toy model of a spherical universe made up of an exotic dark gas with temperature in thermal equilibrium with a black-body in adiabatic expansion. Each particle of…
A brief review of a modified relativity that explains cosmological constant
Cláudio Nassif Cruz, A. C. Amaro de Faria
The present review aims to show that a modified space-time with an invariant minimum speed provides a relation with Weyl geometry in the Newtonian approximation of weak-field. The…
The K-essence flow seen from the preferred frame . A scalar field theory with Landau superfluid structure
Rodrigo Francisco dos Santos, Luis Gustavo de Almeida, A. C. Amaro de Faria
We study the hypothesis of deformation of the invariance of Lorentz transformations produced by the introduction of a universal minimum velocity relative to a preferred frame. Our…
Deformed Special Relativity with a minimum speed as explanation of the tiny value of the cosmological constant based on the Boomerang experiment in the scenario
Cláudio Nassif Cruz, A. C. Amaro de Faria
In this paper we will show that a new structure of space-time with a minimum speed reveals a connection with Weyl geometry in the approximation of weak-field Newtonian limit. Symme…
Variation of the fundamental constants over the cosmological time: veracity of Dirac's intriguing hypothesis
Cláudio Nassif, A. C. Amaro de Faria
We investigate how the universal constants, including the fine structure constant, have varied since the early universe close to the Planck energy scale (GeV) and,…
Testing Lorentz symmetry violation with an invariant minimum speed
Cláudio Nassif, A. C. Amaro de Faria, Rodrigo Francisco dos Santos
This work presents an experimental test of Lorentz invariance violation in the infrared (IR) regime by means of an invariant minimum speed in the spacetime and its effects on the t…
Unruh effect as foundation of universal gravitation within the cosmological scenario
Claudio Nassif, A. C. Amaro de Faria
We aim to build a simple model of a gas with temperature () in thermal equilibrium with a black-body that plays the role of the adiabatically expanding universe, so that each pa…
Invariance of the fine structure constant with temperature of the expanding universe
Claudio Nassif, A. C. Amaro de Faria
Our goal is to interpret the energy equation from Doubly Special Relativity (DSR) of Magueijo-Smolin with an invariant Planck energy scale in order to obtain the speed of light wit…
Variation of the speed of light with temperature of the expanding universe
Cláudio Nassif Cruz, Antônio Carlos Amaro de Faria
From an extended relativistic dynamics for a particle moving in a cosmic background field with temperature T, we aim to obtain the speed of light with an explicit dependence on the…
Asymptotic freedom and quarks confinement treated through Thompson's approach
Claudio Nassif, A. C. Amaro de Faria, P. R. Silva
In this work, we first use Thompson's renormalization group method to treat QCD-vacuum behavior close to the regime of asymptotic freedom. QCD-vacuum behaves effectively like a "pa…