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Award ID contains: 2112680

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  1. ; (, Physical Review D)
    We explore flavored resonant leptogenesis embedded in a neutrinophilic two-Higgs-doublet model. Successful leptogenesis is achieved by the very mildly degenerate two heavier right-handed neutrinos (RHNs) 𝑁2 and 𝑁3 with a level of only Δ⁒𝑀32/𝑀2∼π’ͺ⁑(0.1%–1%). The lightest RHN, with a MeV–GeV mass, lies below the sphaleron freeze-out temperature and is stable, serving as a dark matter candidate. The model enables TeV-scale leptogenesis while avoiding the extreme mass degeneracy typically plaguing conventional resonant leptogenesis. Baryon asymmetry, neutrino masses, and potentially even dark matter relic density can be addressed within a unified, experimentally testable framework. 
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    Free, publicly-accessible full text available June 1, 2026
  2. ; ; ; (, Physical Review D)
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  3. ; (, Journal of High Energy Physics)
    A bstract We propose a new scenario of leptogenesis, which is triggered by a first-order phase transition (FOPT). The right-handed neutrinos (RHNs) are massless in the old vacuum, while they acquire a mass in the new vacuum bubbles, and the mass gap is huge compared with the FOPT temperature. The ultra-relativistic bubble walls sweep the RHNs into the bubbles, where the RHNs experience fast decay and generate the lepton asymmetry, which is further converted to the baryon asymmetry of the Universe (BAU). Since the RHNs are out of equilibrium inside the bubble, the generated BAU does not suffer from the thermal bath washout. We first discuss the general feature of such a FOPT leptogenesis mechanism, and then realize it in an extended B βˆ’ L model. The gravitational waves from U(1) Bβˆ’L breaking could be detected at the future interferometers. 
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  4. ; (, Physical Review D)
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  5. ; ; ; (, Physical Review D)
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