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Lepton Asymmetric Universe

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arxiv 2203.09713 v2 pith:45NMXK2K submitted 2022-03-18 hep-ph astro-ph.CO

Masahiro Kawasaki , Kai Murai This is my paper · ORCID
classification hep-phastro-ph.CO
keywords leptonnumberl-ballsuniverseasymmetrygeneratedlargemechanism
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abstract

The recent observation of $^4$He implies that our universe has a large lepton asymmetry. We consider the Affleck-Dine (AD) mechanism for lepton number generation. In the AD mechanism, non-topological solitons called L-balls are produced, and the generated lepton number is confined in them. The L-balls protect the generated lepton number from being converted to baryon number through the sphaleron processes. We study the formation and evolution of the L-balls and find that the universe with large lepton asymmetry suggested by the recent $^4$He measurement can be realized.

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Cited by 2 Pith papers

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

  1. Cogenesis of baryon and lepton number asymmetries matching the EMPRESS Data

    hep-ph 2025-09 conditional novelty 5.0 of 10

    A U(1)_{B-L} flaton decay chain can produce both a large positive electron-neutrino asymmetry and the observed baryon asymmetry, with values matching EMPRESS and BBN for a symmetry-breaking scale around 10^10 GeV.

  2. Neutrinophilic $\mathbf{\Lambda}$CDM Extension for EMPRESS, DESI and Hubble Tension

    hep-ph 2025-01 conditional novelty 5.0 of 10

    A combined fit of EMPRESS, DESI BAO, and CMB data prefers a neutrino asymmetry xi_nu = 0.056 +/- 0.017 and extra radiation delta_Neff = 0.41 +/- 0.16 in a neutrinophilic LambdaCDM model.

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