Negative Mass Cosmology and fine tuning issue

 

arXiv:2105.11041  [pdf, ps, other] 

 

gr-qc astro-ph.CO

On Negative Mass Cosmology in General Relativity

Authors: Sebastián Nájera, Aldo Gamboa, Alejandro Aguilar-Nieto, Celia Escamilla-Rivera

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 in 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.

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