Toward a solution of the coincidence problem

Abstract

The coincidence problem of late cosmic acceleration constitutes a serious riddle with regard to our understanding of the evolution of the Universe. Here we argue that this problem may someday be solved -or better understood- by expressing the Hubble expansion rate as a function of the ratio of densities (dark matter/dark energy) and observationally determining the said rate in terms of the redshift.

Comments: 14 pages, 5 figures. Key words: Cosmology, dark energy, coincidence problem. Slightly extended version of the paper published in Phys. Rev. D as rapid communication