Cascade Slow Roll
Kohsaku Tobioka (Tel Aviv/Weizmann)

Particle production takes important rolls in the early universe, such as during inflation, preheating and reheating eras. I discuss particle production of many species as a new slow roll mechanism. In particular, the effect is exponentially enhanced by cascade decays. Also, such particle production can be relevant to a recent idea, cosmological relaxion mechanism. This is a blackboard talk and based on preliminary results.