Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2012/03/019
Keywords
dark matter theory; baryon asymmetry
Funding
- ERC [BSMOXFORD 228169]
- Royal Society
- EU ITN [UNILHC 237920]
- STFC
- Science and Technology Facilities Council [ST/J000507/1] Funding Source: researchfish
- STFC [ST/J000507/1] Funding Source: UKRI
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We investigate, in the context of asymmetric dark matter (DM), a new mechanism of spontaneous co-genesis of linked DM and baryon asymmetries, explaining the observed relation between the baryon and DM densities, Omega(DM)/Omega(B) similar or equal to 5. The co-genesis mechanism requires a light scalar field, phi, with mass below 5 eV which couples derivatively to DM, much like a 'dark axion'. The field phi can itself provide a final state into which the residual symmetric DM component can annihilate away.
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