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- W2003127104 abstract "We reformulate cosmological perturbations in the decaying cold dark mattermodel, and calculate cosmological microwave background anisotropies. By comparingour predictions with data from the Wilkinson Microwave Anisotropy Probe, wederive a new bound on the abundance and lifetime of decaying dark matter particles.The lifetime is constrained to ${ensuremath{Gamma}}^{ensuremath{-}1}ensuremath{ge}123text{ }mathrm{G}mathrm{y}mathrm{r}$ at 68% C.L. (52 Gyrat 95.4% C.L.) when cold dark matter consists only of such decaying particles.We also consider a more general case and show that the constraint generalizesto ${ensuremath{Omega}}_{mathrm{D}mathrm{D}mathrm{M}}{h}^{2}ensuremath{lesssim}ensuremath{-}0.5({ensuremath{Gamma}}^{ensuremath{-}1}/1text{ }mathrm{G}mathrm{y}mathrm{r}{)}^{ensuremath{-}1}+0.12$ for ${ensuremath{Gamma}}^{ensuremath{-}1}ensuremath{ge}5text{ }mathrm{G}mathrm{y}mathrm{r}$ at 95.4% C.L." @default.
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- W2003127104 date "2004-08-01" @default.
- W2003127104 modified "2023-10-02" @default.
- W2003127104 title "Constraints from the Wilkinson Microwave Anisotropy Probe on DecayingCold Dark Matter" @default.
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- W2003127104 doi "https://doi.org/10.1103/physrevlett.93.071302" @default.
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