%0 Journal Article
%T What if Newton¡¯s Gravitational Constant Was Negative?
%A Ismael Ayuso
%A Jos¨¦ P. Mimoso
%A Nelson J. Nunes
%J Galaxies | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/galaxies7010038
%X In this work, we seek 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 field theory natural framework for the variation of the gravitational coupling. We find that models with a quadratic potential naturally stabilize the value of G into the positive branch of the evolution and further, that de Sitter inflation and a relaxation to General Relativity is easily attained. View Full-Tex
%U https://www.mdpi.com/2075-4434/7/1/38