Cold and hot dark matter from a single nonthermal relic

Ram Brustein, Merav Hadad

Research output: Contribution to journalArticlepeer-review


The origin of dark matter in the Universe may be scalar particles produced by amplification of quantum fluctuations during a period of dilaton-driven inflation. We show, for the first time, that a single species of such particles, depending on its mass and interactions, can be a source of both cold and hot dark matter simultaneously. Detection of such weakly interacting particles with masses below a fraction of an eV presents a new challenge for dark matter searches.

Original languageEnglish
Pages (from-to)3016-3019
Number of pages4
JournalPhysical Review Letters
Issue number15
StatePublished - 12 Apr 1999
Externally publishedYes


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