Simple parametrisation for coupled dark energy
  We propose a phenomenological generalisation of the standard model with only
one extra degree of freedom that parametrises the evolution of a scalar field
responsible for the cosmic acceleration. The model also foresees an additional
parameter in the form of a coupling between dark energy and dark matter. This
model captures a large diversity of dark energy evolutions at low redshift and
could usefully complement common CPL parametrisations widely used. In this
context, we have been constraining the parametrisation with data from Planck
and KiDS, bringing different results between the early and late universe
observations.
