Model-independent dark energy test withσ8using results from the Wilkinson Microwave Anisotropy Probe

Abstract
By combining the recent WMAP measurements of the cosmic microwave background anisotropies and the results of the recent luminosity distance measurements to type-Ia supernovae, we find that the normalization of the matter power spectrum on cluster scales, σ8, can be used to discriminate between dynamical models of dark energy (quintessence models) and a conventional cosmological constant model (ΛCDM).