Super-cool Dark Matter

Abstract

In dimension-less theories of dynamical generation of the weak scale, the Universe can undergo a period of low-scale inflation during which all particles are massless and super-cool. This leads to a new mechanism of generation of the cosmological Dark Matter (DM) relic density: super-cooling can easily suppress the amount of DM to the desired level. This is achieved for TeV-scale DM, if super-cooling ends when quark condensates form at the QCD phase transition. Along this scenario, the baryon asymmetry can be generated either at the phase transition or through leptogenesis. We show that the above mechanism takes place in old and new dimension-less models.

20 pages, 5 figures. Journal version

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• Nuclear Fusion Inside Dark Matter
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• Detailed Calculation of Primordial Black Hole Formation During First-Order Cosmological Phase Transitions
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• Bubbletrons: Ultrahigh-Energy Particle Collisions and Heavy Dark Matter at Phase Transitions
• New Physics Search at the CEPC: a General Perspective
• Annihilogenesis
• Consistent Conformal Extensions of the Standard Model
• Remark on the QCD-electroweak phase transition in a supercooled Universe
• Neutrino lines from DM decay induced by high-scale seesaw interactions
• Hydrodynamic effects on the filtered dark matter produced by a first-order phase transition
• Gravitational effects on fluid dynamics in cosmological first-order phase transitions
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• No room for minimal monopole dark matter