Dynamical dark matter: A new framework for dark-matter physics

Keith R. Dienes, Brooks Thomas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Although much remains unknown about the dark matter of the universe, one property is normally considered sacrosanct: dark matter must be stable well beyond cosmological time scales. However, a new framework for dark-matter physics has recently been proposed which challenges this assumption. In the «dynamical dark matter» (DDM) framework, the dark sector consists of a vast ensemble of individual dark-matter components with differing masses, lifetimes, and cosmological abundances. Moreover, the usual requirement of stability is replaced by a delicate balancing between lifetimes and cosmological abundances across the ensemble as a whole. As a result, it is possible for the DDM ensemble to remain consistent with all experimental and observational bounds on dark matter while nevertheless giving rise to collective behaviors which transcend those normally associated with traditional dark-matter candidates. These include a new, non-trivial darkmatter equation of state as well as potentially distinctive signatures in collider and direct-detection experiments. In this review article, we provide a self-contained introduction to the DDM framework and summarize some of the work which has recently been done in this area. We also present an explicit model within the DDM framework, and outline a number of ideas for future investigation.

Original languageEnglish (US)
Title of host publicationWorkshop on Dark Matter, Unification and Neutrino Physics, CETUP* 2012
Number of pages21
StatePublished - 2013
Event2nd Workshop on Dark Matter, Unification and Neutrino Physics, CETUP* 2012 - Lead/Deadwood, SD, United States
Duration: Jul 10 2012Aug 1 2012

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other2nd Workshop on Dark Matter, Unification and Neutrino Physics, CETUP* 2012
Country/TerritoryUnited States
CityLead/Deadwood, SD


  • Axion
  • DDM
  • Dark matter
  • Ensemble
  • Equation of state
  • Kaluza-Klein
  • Multi-component

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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