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• W2885160688 endingPage "038" @default.
• W2885160688 startingPage "038" @default.
• W2885160688 abstract "A period of early matter domination can give rise to the correct dark matter abundance for a broad range of dark matter annihilation rate $langle sigma_{rm ann} v rangle_{rm f}$. Here, we examine this scenario for situations where $langle sigma_{rm ann} v rangle_{rm f}$ is below the nominal value for thermal dark matter $3 times 10^{-26}$ cm$^3$ s$^{-1}$ as possibly indicated by some recent experiments. We show that obtaining the correct relic abundance sets a lower bound on the duration of early matter domination era in this case. On the other hand, provided that the post-inflationary universe has an equation of state characterized by $w leq 1/3$, the requirement that the scalar spectral index $n_s$ be within the observationally allowed range limits the duration of this epoch from above. By combining these considerations, we show that the current and future cosmic microwave background experiments can tightly constrain the parameter space for this scenario. In particular, models of inflation with a tensor-to-scalar ratio below ${cal O}(0.01)$ may disfavor non-thermal supersymmetric dark matter from a modulus-driven early matter domination epoch." @default.
• W2885160688 created "2018-08-22" @default.
• W2885160688 creator A5058049875 @default.
• W2885160688 creator A5059939586 @default.
• W2885160688 creator A5072138059 @default.
• W2885160688 date "2018-10-22" @default.
• W2885160688 modified "2023-09-25" @default.
• W2885160688 title "Constraining non-thermal dark matter by CMB" @default.
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• W2885160688 doi "https://doi.org/10.1088/1475-7516/2018/10/038" @default.
• W2885160688 hasPublicationYear "2018" @default.
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