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- W2901272806 abstract "We present a model where the inflaton can naturally account for all the dark matter in the Universe within the warm inflation paradigm. In particular, we show that the symmetries of the Warm Little Inflaton scenario (i) avoid large thermal and radiative corrections to the scalar potential, (ii) allow for sufficiently strong dissipative effects to sustain a radiation bath during inflation that becomes dominant at the end of the slow-roll regime, and (iii) enable a stable inflaton remnant in the post-inflationary epochs. The latter behaves as dark radiation until parametrically before matter-radiation equality, leading to a non-negligible contribution to the effective number of relativistic degrees of freedom during nucleosynthesis, becoming the dominant cold dark matter component in the Universe for inflaton masses in the $10^{-4}-10^{-1}$ eV range. Cold dark matter isocurvature perturbations, anti-correlated with the main adiabatic component, provide a smoking gun for this scenario that can be tested in the near future." @default.
- W2901272806 created "2018-11-29" @default.
- W2901272806 creator A5069319908 @default.
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- W2901272806 date "2019-04-24" @default.
- W2901272806 modified "2023-10-14" @default.
- W2901272806 title "Warm Little Inflaton Becomes Cold Dark Matter" @default.
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- W2901272806 doi "https://doi.org/10.1103/physrevlett.122.161301" @default.
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