Speaker
Ayuki Kamada
(CTPU IBS)
Description
Thermal freeze-out of dark matter is a prominent mechanism to explain the relic abundance. There are several processes suggested to govern thermal freeze-out: pair-annihilation, semi-annihilation, and 3-to-2 process. Among them, semi-annihilation is distinctive. It causes an efficient conversion from the mass energy into the kinetic energy in collaboration with self-interaction. This phenomenon is dubbed as self-heating.
I will discuss both the early and late stages of structure formation of the Universe in self-heating dark matter.
Particular stress is put on that the impact of self-heating drastically increases toward smaller-size halos.
