3 years ago

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

Damien Bégué, Clément Stahl, She-sheng Xue

Publication date: Available online 8 January 2019

Source: Nuclear Physics B

Author(s): Damien Bégué, Clément Stahl, She-Sheng Xue

##### 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.

DOI: S0550321319300033

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