Baryogenesis at a Lepton-Number-Breaking Phase Transition

Abstract

We study a scenario in which the baryon asymmetry of the universe arises from a cosmological phase transition where lepton-number is spontaneously broken. If the phase transition is first order, a lepton-number asymmetry can arise at the bubble wall, through dynamics similar to electroweak baryogenesis, but involving right-handed neutrinos. In addition to the usual neutrinoless double beta decay in nuclear experiments, the model may be probed through a variety of "baryogenesis by-products," which include a stochastic background of gravitational waves created by the colliding bubbles. Depending on the model, other aspects may include a network of topological defects that produce their own gravitational waves, additional contribution to dark radiation, and a light pseudo-Goldstone boson (majoron) as dark matter candidate.

21 pages + 10 appendices & references, 3 figures

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Cited by in corpus (20)

• Cosmic phase transitions: their applications and experimental signatures
• Gravitational Waves from First-Order Phase Transitions: LIGO as a Window to Unexplored Seesaw Scales
• Gravitational waves and proton decay: complementary windows into GUTs
• Baryogenesis and gravity waves from a UV-completed electroweak phase transition
• Leptogenesis triggered by a first-order phase transition
• Quantisation Across Bubble Walls and Friction
• Electroweak baryogenesis in the Z3-invariant NMSSM
• Filtered asymmetric dark matter during the Peccei-Quinn phase transition
• Phase Transitions and Baryogenesis From Decays
• The hydrodynamics of inverse phase transitions
• Bubble wall dynamics from nonequilibrium quantum field theory
• PeV-scale leptogenesis, gravity waves and black holes from a SUSY-breaking phase transition
• $\nu$ Electroweak Baryogenesis
• Inverse bubbles from broken supersymmetry
• Gravitational waves from patterns of electroweak symmetry breaking: an effective perspective
• Baryogenesis via relativistic bubble expansion
• Leptogenesis via Varying Weinberg Operator: the Closed-Time-Path Approach
• Filtered Baryogenesis
• Gravitational waves from the sound shell model: direct and inverse phase transitions in the early Universe
• Baryogenesis via relativistic bubble walls