Echo of interactions in the dark sector

By Suresh Kumar, Rafael C. Nunes. 2017

168 citations recorded by the source corpus.

We investigate the observational constraints on an interacting vacuum energy scenario with two different neutrino schemes (with and without a sterile neutrino) using the most recent data from cosmic microwave background (CMB) temperature and polarization anisotropy, baryon acoustic oscillations (BAO), type Ia supernovae from JLA sample and structure growth inferred from cluster counts. We find that inclusion of the galaxy clusters data with the minimal data combination $\mathrm{CMB}+\mathrm{BAO}+\mathrm{JLA}$ suggests an interaction in the dark sector, implying the decay of dark matter particles into dark energy, since the constraints obtained by including the galaxy clusters data yield a non-null and negative coupling parameter between the dark components at 99% confidence level. We deduce that the current tensions on the parameters ${H}_{0}$ and ${\ensuremath{\sigma}}_{8}$ can be alleviated within the framework of the interacting as well as noninteracting vacuum energy models with sterile neutrinos.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6b1efee76bf0ee0be7b76c3a5879207675df363e

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Citations in the corpus

Nonminimal dark sector physics and cosmological tensions (2019, background): “4 These models may also be an interesting key towards solving some existing cosmological tensions [188, 210–224].”
Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, unknown): “[240–259].”
Interacting dark energy with time varying equation of state and the H0 tension (2018, background): “The results show that the observational data favor a non-zero coupling in the dark sectors [11, 12, 13, 22, 23, 40], although small but still a small deviation from the standard Λ- cosmology is signaled.”
New physics in light of the H0 tension: An alternative view (2019, background): “[60–209] for what is inevitably an incomplete list of works examining these possibilities.”
Cosmology Intertwined II: The Hubble Constant Tension (2020, unknown): “[54] S.”
Interacting scenarios with dynamical dark energy: Observational constraints and alleviation of the H0 tension (2019, background): “This motivates us to consider a wider picture in which the interaction should be allowed too, and to check whether the H0 tension is still released, since it has been argued that an allowance of a non-gravitational interaction between dark matter and dark energy naturally increases the error bars on”