A model of interacting dark fluids tested with supernovae and Baryon Acoustic Oscillations data

Bégué, Damien (Max Planck Institute for extraterrestrial Physics, Giessenbachstrasse 1, Garching, 85748, Germany) ; Stahl, Clément  (Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4950, Valparaíso, Chile) ; Xue, She-Sheng (ICRANet, Piazzale della Repubblica 10, Pescara, 65122, Italy)

08 February 2019

Abstract: We compare supernovae and Baryon Acoustic Oscillations data to the predictions of a cosmological model of interacting dark matter and dark energy. This theoretical model can be derived from the effective field theory of Einstein–Cartan gravity with two scaling exponents δG and δΛ , related to the interaction between dark matter and dark energy. We perform a χ2 fit to the data to compare and contrast it with the standard ΛCDM model. We then explore the range of parameter of the model which gives a better χ2 than the standard cosmological model. All those results lead to tight constraints on the scaling exponents of the model. Our conclusion is that this class of models, provides a decent alternative to the ΛCDM model.

Published in: Nuclear Physics B 940 (2019) 312-320
Published by: Elsevier
DOI: 10.1016/j.nuclphysb.2019.01.001
License: CC-BY-3.0

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