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We present new constraints on interacting dark energy from the recent measurements of the Cosmic Microwave Background Anisotropies from the Planck satellite experiment. We show that an interacting dark-energy model is compatible with the Planck measurements, deriving a weak bound on the dark matter-dark energy coupling parameter ξ=−0.49+0.19−0.31 at 68% c.l. Moreover if Planck data are fitted to an interacting dark energy scenario, the constraint on the Hubble constant is relaxed to H0=72.1+3.2−2.3 km/s/Mpc, solving the tension with the Hubble Space Telescope measurement. We find that a combined Planck+HST analysis provides significant evidence for coupled dark energy finding a non-zero value for the coupling parameter ξ, with −0.90<ξ<−0.22 at 95% c.l.
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