In dark matter-dark energy coupling models, the Kaiser formula gains a coupling-dependent term, so redshift-space distortions measure an effective growth rate that differs from the true matter growth rate, with Euclid and SKA2 forecasts.
This kind of interaction was first proposed in the context of coupled quintessence in [53] and has been further investigated in [54–56]
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Redshift space distortions in the presence of non-minimally coupled dark matter
In dark matter-dark energy coupling models, the Kaiser formula gains a coupling-dependent term, so redshift-space distortions measure an effective growth rate that differs from the true matter growth rate, with Euclid and SKA2 forecasts.