Is it time to go beyond $\Lambda$CDM universe?

Understand

Concordance $\Lambda$CDM universe is the simplest model that is consistent with a large variety of cosmological observations till date.

• But few recent observations indicate inconsistencies in $\Lambda$CDM model.
• In this paper, we consider the combination of recent SnIa+Bao+Cmb+Growth+$H(z)$+$H_{0}$ measurements to revisit the constraints on the dark energy evolution using the widely studied CPL parametrisation for the dark energy equation of state.
• Although the reconstructed behaviour for the dark energy equation of state confirms the inconsistency of $\Lambda$CDM at $95\%$ confidence level, the reconstructed $Om$ diagnostic which is a {\it null test} for $\Lambda$CDM, still allows the concordance $\Lambda$CDM behaviour with a lower range of $\Omega_{m0}$ than that obtained by Planck-2015.