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- W3101797807 abstract "Since only recently, cosmological observations are sensitive to hot dark matter (HDM) admixtures with sub-eV mass, $m_text{hdm}^text{eff}$ < eV, that are not fully-thermalised, $N_text{eff}$ < 1. We argue that their almost automatic interpretation as a sterile neutrino species is neither from theoretical nor practical parsimony principles preferred over HDM formed by decay products (daughters) of an out-of-equilibrium particle decay. While daughters mimic sterile neutrinos in $N_text{eff}$ and $m_text{hdm}^text{eff}$, there are opportunities to assess this possibility in likelihood analyses. Connecting cosmological parameters and moments of momentum distribution functions, we show that --also in the case of mass-degenerate daughters with indistinguishable main physical effects-- the mimicry breaks down when the next moment, the skewness, is considered. Predicted differences of order one in the root-mean-squares of absolute momenta are too small for current sensitivities." @default.
- W3101797807 created "2020-11-23" @default.
- W3101797807 creator A5008767945 @default.
- W3101797807 date "2014-09-26" @default.
- W3101797807 modified "2023-10-18" @default.
- W3101797807 title "Daughters mimic sterile neutrinos (almost!) perfectly" @default.
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- W3101797807 doi "https://doi.org/10.1088/1475-7516/2014/09/048" @default.
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