Super-cool Dark Matter

Understand

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.