Letter to the Editor

On negative mass cosmology in General Relativity

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior CU, AP 70-543, México DF 04510, Mexico
e-mail: najera.sebastian@ciencias.unam.mx, aldojavier@ciencias.unam.mx, celia.escamilla@nucleares.unam.mx

Received: 26 May 2021
Accepted: 1 July 2021

Abstract

In this Letter we present strong arguments in favour of thoroughly revising the negative mass cosmology (NMC), which has been proposed as a simple alternative explanation of dark energy and dark matter effects, within the framework of general relativity. We show that there are various physical predictions of this model which require fine-tuning in order to make them compatible with current cosmological surveys. In this way, the original motivation of the NMC model becomes obscured due to the imposition of fine-tuned unknown variables. We conclude that a more rigorous theoretical treatment is needed in order to make the NMC a viable cosmological model.