The well-known tensions on the cosmological parameters H0β and Ο8β
within the ΞCDM cosmology shown by the Planck-CMB and LSS data are
possibly due to the systematics in the data or our ignorance of some new
physics beyond the ΞCDM model. In this letter, we focus on the second
possibility, and investigate a minimal extension of the ΞCDM model by
allowing a coupling between its dark sector components (dark energy and dark
matter). We analyze this scenario with Planck-CMB, KiDS and HST data, and find
that the H0β and Ο8β tensions disappear at 68\% CL. In the joint
analyzes with Planck, HST and KiDS data, we find non-zero coupling in the dark
sector up to 99\% CL. Thus, we find a strong statistical support from the
observational data for an interaction in the dark sector of the Universe while
solving the H0β and Ο8β tensions simultaneously.Comment: 5 pages, 3 figure