Baryogenesis via relativistic bubble walls

Abstract

We present a novel mechanism which leads to the baryon asymmetry generation during the strong first order phase transition. If the bubble wall propagates with ultra-relativistic velocities, it has been shown that it can produce states much heavier than the scale of the transition and that those states are then out-of-equilibrium. In this paper, we show that the production mechanism can also induce CP-violation at one-loop level. We calculate those CP violating effects during the heavy particle production and show, that combined with baryon number violating interactions, those can lead to successful baryogenesis. Two models based on this mechanism are constructed and their phenomenology is discussed. Stochastic gravitational wave signals turn out to be generic signatures of this type of models.

20 pages + appendix, 5 figures, references added, typos corrected, CP violation in decay taken into account, JHEP version

References in corpus (10)

• Leptogenesis
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Gravitational wave energy budget in strongly supercooled phase transitions
• Dynamics of Non-renormalizable Electroweak Symmetry Breaking
• Bubble wall velocity: heavy physics effects
• A Confining Strong First-Order Electroweak Phase Transition
• Post--Sphaleron Baryogenesis
• Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
• Baryogenesis from Oscillations of Charmed or Beautiful Baryons
• Dark Matter production from relativistic bubble walls