Do WMAP data favor neutrino mass and a coupling between Cold Dark Matter and Dark Energy?

We fit WMAP5 and related data by allowing for a CDM-DE coupling and non-zero neutrino masses, simultaneously. We find a significant correlation between these parameters, so that simultaneous higher coupling and ν-masses are allowed. Furthermore, models with a significant coupling and ν-mass are statistically favoured in respect to a cosmology with no coupling and negligible neutrino mass (our best fits are: C∼1/2 m_p, m_ν∼0.12 eV per flavor). We use a standard Monte Carlo Markov Chain approach, by assuming DE to be a scalar field self-interacting through Ratra-Peebles or SUGRA potentials. [ABSTRACT FROM AUTHOR]