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Asymmetric dark matter in braneworld cosmology
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We investigate the effect of a braneworld expansion era on the relic density of asymmetric dark matter. We find that the enhanced expansion rate in the early universe predicted by the Randall-Sundrum II (RSII) model leads to earlier particle freeze-out and an enhanced relic density. This effect has been observed previously by Okada and Seto (2004) for symmetric dark matter models and here we extend their results to the case of asymmetric dark matter. We also discuss the enhanced asymmetric annihilation rate in the braneworld scenario and its implications for indirect detection experiments.
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Constraints on Asymmetric Dark Matter Self Annihilation Cross Sections
In asymmetric dark matter with self-annihilation, the shear-dominated universe permits a higher self-annihilation cross section and a lower wino mass limit than standard cosmology, while the Gauss-Bonnet braneworld do...
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