Concentrated dark matter

Enhanced small-scale structure from codecaying dark matter

Jeff A. Dror, Eric Kuflik, Brandon Melcher, Gary S Watson

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We study the cosmological consequences of codecaying dark matter - a recently proposed mechanism for depleting the density of dark matter through the decay of nearly degenerate particles. A generic prediction of this framework is an early dark matter dominated phase in the history of the Universe, that results in the enhanced growth of dark matter perturbations on small scales. We compute the duration of the early matter dominated phase and show that the perturbations are robust against washout from free streaming. The enhanced small-scale structure is expected to survive today in the form of compact microhalos and can lead to significant boost factors for indirect-detection experiments, such as FERMI, where dark matter would appear as point sources.

Original languageEnglish (US)
Article number063524
JournalPhysical Review D
Volume97
Issue number6
DOIs
StatePublished - Mar 15 2018

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dark matter
perturbation
fallout
acceleration (physics)
point sources
universe
histories
decay
predictions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Concentrated dark matter : Enhanced small-scale structure from codecaying dark matter. / Dror, Jeff A.; Kuflik, Eric; Melcher, Brandon; Watson, Gary S.

In: Physical Review D, Vol. 97, No. 6, 063524, 15.03.2018.

Research output: Contribution to journalArticle

Dror, Jeff A. ; Kuflik, Eric ; Melcher, Brandon ; Watson, Gary S. / Concentrated dark matter : Enhanced small-scale structure from codecaying dark matter. In: Physical Review D. 2018 ; Vol. 97, No. 6.
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