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• W4387398220 endingPage "101353" @default.
• W4387398220 startingPage "101353" @default.
• W4387398220 abstract "Measurements of the primordial element abundances provide us with an important probe of our universe’s early thermal history, allowing us to constrain the expansion rate and composition of our universe as early as ∼1s after the Big Bang. Prior to this time, we have essentially no empirical information on which to base any such claims. In this paper, we imagine a future time in which we have not only detected the particles that make up the dark matter, but have measured their mass and annihilation cross section with reasonable precision. In analogy to the light element abundances, the dark matter abundance in this scenario could be used to study and constrain the expansion rate and composition of our universe at the time of dark matter freeze out, which for a standard thermal relic occurs at Tf∼mχ/20, corresponding to t∼4×10−10s×(TeV/mχ)2, many orders of magnitude prior to the onset of Big Bang nucleosynthesis. As examples, we consider how such measurements could be used to constrain scenarios which feature exotic forms of radiation or matter, a ultralight scalar, or modifications to gravity, each of which have the potential to be much more powerfully probed with dark matter than with the light element abundances." @default.
• W4387398220 created "2023-10-07" @default.
• W4387398220 creator A5058056387 @default.
• W4387398220 creator A5066143858 @default.
• W4387398220 date "2023-10-01" @default.
• W4387398220 modified "2023-10-07" @default.
• W4387398220 title "Dark matter is the new BBN" @default.
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• W4387398220 doi "https://doi.org/10.1016/j.dark.2023.101353" @default.

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