Regenerating a symmetry in asymmetric dark matter

Matthew Buckley, Stefano Profumo

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Asymmetric dark matter theories generically allow for mass terms that lead to particle-antiparticle mixing. Over the age of the Universe, dark matter can thus oscillate from a purely asymmetric configuration into a symmetric mix of particles and antiparticles, allowing for pair-annihilation processes. Additionally, requiring efficient depletion of the primordial thermal (symmetric) component generically entails large annihilation rates. We show that unless some symmetry completely forbids dark matter particle-antiparticle mixing, asymmetric dark matter is effectively ruled out for a large range of masses, for almost any oscillation time scale shorter than the age of the Universe.

Original languageEnglish (US)
Article number011301
JournalPhysical review letters
Volume108
Issue number1
DOIs
StatePublished - Jan 4 2012

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antiparticles
dark matter
symmetry
universe
depletion
oscillations
configurations

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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Regenerating a symmetry in asymmetric dark matter. / Buckley, Matthew; Profumo, Stefano.

In: Physical review letters, Vol. 108, No. 1, 011301, 04.01.2012.

Research output: Contribution to journalArticle

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