Oral comunication
J. P. Mimoso, I. Ayuso, N. J. Nunes
Abstract
In this work, we investigate a cosmological mechanism that may define the sign of the effective gravitational coupling constant, G. To this end, we consider general scalar-tensor gravity theories as they provide the natural framework in filed theory for the variation of the gravitational coupling. We find that models with a quadratic potential naturally stabilise the value of G into the positive branch of the evolution and further, that de Sitter inflation and a relaxation to General Relativity is simultaneously attained.
XXIX Encontro Nacional de Estudantes de Astronomia
Lisboa, Portugal
2019 September
