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Dark Matter production from relativistic bubble walls
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Dark Matter production from relativistic bubble walls
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In this paper we present a novel mechanism for producing the observed Dark Matter(DM) relic abundance during the First Order Phase Transition (FOPT) in the early universe. We show that the bubble expansion with ultra-relativistic velocities can lead to the abundance of DM particles with masses much larger than the scale of the transition. We study this non-thermal production mechanism in the context of a generic phase transition and the electroweak phase transition. The application of the mechanism to the Higgs portal DM as well as the signal in the Stochastic Gravitational Background are discussed.
Forward citations
Cited by 11 Pith papers
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The fluid-Ansatz and WallGo methods agree for mild phase transitions but diverge by tens of percent for strong ones, where the semi-classical approximation itself may break down.
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Dynamical evolution of the pressure on the bubble wall
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Sphaleron rates can be computed gauge-invariantly in 3D thermal EFT, yielding a new baryon-washout criterion x = lambda3/g3^2 that replaces v_c/T_c > 1 for electroweak baryogenesis.
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