title: Testing the cosmic coincidence problem and the nature of dark energy.
abstract: Dark energy models which alter the relative scaling behavior of dark energy and matter could provide a natural solution to the cosmic coincidence problem-why the densities of dark energy and dark matter are comparable today. A generalized class of dark energy models is introduced which allows noncanonical scaling of the ratio of dark matter and dark energy with the Robertson-Walker scale factor a(t). We show that determining whether there is a coincidence problem, and the extent of cosmic coincidence, can be addressed by several forthcoming experiments.
authors.affiliation: Department of Physics, University of California at San Diego, La Jolla, California 92093-0319, USA.
authors.forename: N
authors.initials: N
authors.lastname: Dalal
authors.forename: K
authors.initials: K
authors.lastname: Abazajian
authors.forename: E
authors.initials: E
authors.lastname: Jenkins
authors.forename: A V
authors.initials: AV
authors.lastname: Manohar