Phenomenology of dynamical dark matter

Dynamical dark matter (DDM) is a new framework for dark-matter physics in which the dark sector comprises an ensemble of individual constituent fields, and in which the usual requirement of dark-matter stability is replaced by a balancing between constituent lifetimes and cosmological abundances across the ensemble as a whole. In this article, we review some of the phenomenological possibilities inherent within the DDM framework. In particular, we discuss some of the ways in which DDM ensembles can be distinguished from traditional dark-matter candidates experimentally, both at the LHC and at the next generation of direct-detection experiments.