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- W3201376445 abstract "The hot and dense early Universe combined with the promise of high-precision cosmological observations provide an intriguing laboratory for Beyond Standard Model (BSM) physics. We simulate the early Universe to examine the effects of the decay of thermally populated sterile neutrino states into Standard Model products around the time of weak decoupling. These decays deposit a significant amount of entropy into the plasma as well as produce a population of high-energy out-of-equilibrium active neutrinos. As a result, we can constrain these models by their inferred value of $N_{rm eff}$, the effective number of relativistic degrees of freedom. In this work, we explore a variety of models with $N_{rm eff}{}$ values consistent with CMB observations, but with vastly different active neutrino spectra which will challenge the standard cosmological model, affect lepton capture rates on free nucleons, and may significantly affect Big Bang Nucleosynthesis (BBN)." @default.
- W3201376445 created "2021-09-27" @default.
- W3201376445 creator A5015942423 @default.
- W3201376445 creator A5062044267 @default.
- W3201376445 creator A5067054515 @default.
- W3201376445 creator A5082961994 @default.
- W3201376445 date "2022-04-19" @default.
- W3201376445 modified "2023-10-17" @default.
- W3201376445 title "Effects of an intermediate mass sterile neutrino population on the early Universe" @default.
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- W3201376445 doi "https://doi.org/10.1103/physrevd.105.083513" @default.
- W3201376445 hasPublicationYear "2022" @default.
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