As you already know, dark matter(DM) is made of not regular matter (it is not baryonic matter).
➡️DM must be dark: no light goes in or out through (no interactions with photons, i.e. no electromagnetic interaction at all)
➡️DM does not interact with itself. By that, I mean that mathematically you can prove that time needed for self scattering even is bigger than the Universe’s lifetime.
➡️DM weakly interacts with regular matter. Otherwise, we would already see dark matter particles. Moreover, CMB spectrum would be different from what we have right now
➡️DM can not be made of standard model particles, because most of them are charged, while DM is not. Possible candidate could be neutrino- extremely light neutral particle, coming from the atmosphere all over the place. However, other experiments showed that the lower boundary for DM matter is much heavier than neutrino’s mass.
#darkmatter
➡️DM must be dark: no light goes in or out through (no interactions with photons, i.e. no electromagnetic interaction at all)
➡️DM does not interact with itself. By that, I mean that mathematically you can prove that time needed for self scattering even is bigger than the Universe’s lifetime.
➡️DM weakly interacts with regular matter. Otherwise, we would already see dark matter particles. Moreover, CMB spectrum would be different from what we have right now
➡️DM can not be made of standard model particles, because most of them are charged, while DM is not. Possible candidate could be neutrino- extremely light neutral particle, coming from the atmosphere all over the place. However, other experiments showed that the lower boundary for DM matter is much heavier than neutrino’s mass.
#darkmatter