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Big Bang Nucleosynthesis constraints on sterile neutrino and lepton asymmetry of the Universe

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arxiv 2005.06721 v2 pith:RGEWJ2AM submitted 2020-05-14 hep-ph astro-ph.CO

Graciela B. Gelmini , Masahiro Kawasaki , Alexander Kusenko , Kai Murai , Volodymyr Takhistov This is my paper
classification hep-phastro-ph.CO
keywords neutrinossterileconstraintsasymmetrybangleptonnucleosynthesisparameters
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abstract

We consider the cosmological effects of sterile neutrinos with the masses of $150- 450$ MeV. The decay of sterile neutrinos changes the thermal history of the Universe and affects the energy density of radiation at the recombination and the big bang nucleosynthesis (BBN) results. We derive severe constraints on the parameters of sterile neutrinos from the primordial abundances of helium-4 and deuterium. We also find that in a particular model the constraints can be considerably relaxed by assuming a large lepton asymmetry in the active neutrinos. In this case, the consistent parameters result in $N_{\mathrm{eff}} \simeq 3.2- 3.4$ and can alleviate the Hubble tension.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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  3. Multiple Populations of Same Sterile Neutrino as Dark Matter

    hep-ph 2025-07 conditional novelty 6.0 of 10

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    astro-ph.CO 2026-07 conditional novelty 5.5 of 10

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