Probing for dynamics of dark-energy in mass varying neutrinos: Cosmic microwave background radiation and large scale structure

We present cosmological perturbation theory in neutrino probe interacting dark-energy models, and calculate cosmic microwave background anisotropies and matter power spectrum. In these models, the evolution of the mass of neutrinos is determined by the quintessence scalar field, which is responsible for the cosmic acceleration today. We consider several types of scalar field potentials and put constraints on the coupling parameter between neutrinos and dark energy. Assuming the flatness of the universe, the constraint we can derive from the current observation is Sigma m(v) < 0.87eV at the 95% confidence level for the sum over three species of neutrinos.