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Generation of Large Lepton Asymmetries
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abstract
We present here a realistic model to produce a very large lepton asymmetry L of 0.1 to 1, without producing a large baryon asymmetry. The model is based on the Affleck and Dine scenario, in which the field acquiring a large vacuum expectation value during inflation is a s-neutrino right. We require $L$ to be large enough for the electroweak symmetry to be spontaneously broken at all temperatures after inflation, with the consequent suppression of sphaleron transitions.
Forward citations
Cited by 2 Pith papers
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Cogenesis of baryon and lepton number asymmetries matching the EMPRESS Data
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.
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Neutrinophilic $\mathbf{\Lambda}$CDM Extension for EMPRESS, DESI and Hubble Tension
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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