When inverse seesaw meets inverse electroweak phase transition: a novel path to leptogenesis

2025/10/10 by Wen-Yuan Ai, Peisi Huang, Ai, Wen-Yuan +3 · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2510.09000

openalex publication_date 2025/10/10 · openalex created_date 2025/10/14 · openalex updated_date 2026/07/28

Abstract

We propose a new nonthermal leptogenesis mechanism triggered by the cosmic first-order phase transition. The Standard Model is extended with two generations of TeV-scale vectorlike leptons. The lighter generation gives rise to an inverse electroweak phase transition of the Higgs field at T∼200~\rm GeV, restoring the symmetry, and resulting in relativistic bubble expansion in the space. The heavier generation is responsible for neutrino masses via the inverse seesaw mechanism. The interaction between bubble walls and particles in the plasma abundantly produces the vectorlike leptons, and they subsequently undergo CP-violating decay to generate the baryon asymmetry. This mechanism is testable at current and future particle experiments.

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Cited by

• Gravitational waves from the sound shell model: direct and inverse phase transitions in the early Universe

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• Exploring Leptogenesis in the Era of First Order Electroweak Phase Transition
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• Leptogenesis from a Phase Transition in a Dynamical Vacuum
• Dark Matter and Leptogenesis in the Inverse Seesaw
• Testable leptogenesis and 0νββ decay in extended seesaw model