The discussion centers on the potential asymmetry between dark matter and dark antimatter, particularly in the context of interactions during the early universe. Participants explore whether evidence exists for such an asymmetry and the implications of dark matter's interactions with baryonic matter.
Participants express differing views on the existence and implications of dark matter asymmetry, with no consensus reached on the connection between baryon asymmetry and dark matter behavior.
Some claims depend on specific models of dark matter interactions, and the discussion highlights uncertainties regarding the conditions under which dark matter may or may not annihilate.
The general expectation is that there probably isn't any matter/anti-matter asymmetry in dark matter, because dark matter interacts too weakly with itself at lower temperatures to annihilate.alemsalem said:is there evidence to believe that there is an Asymmetry?, for example from the very early universe when there was interaction and annihilation between dark matter and matter
It depends a bit on the model, but typically they stop annihilating while there's still a large amount of both matter and anti-matter making up the dark matter.alemsalem said:But from what I heard, according to popular models the WIMPs where annihlating into standard model particles and where in thermal equilibrium. until some point when they fell out of equilibrium. is that not true?
Chalnoth said:It depends a bit on the model, but typically they stop annihilating while there's still a large amount of both matter and anti-matter making up the dark matter.
I don't think there's any reason to connect the baryon asymmetry to a hypothetical dark matter asymmetry. But no, I don't think that dark matter can behave the way it does and still annihilate with itself so often.alemsalem said:So if it had stayed long enough in equilibrium (after the baryon Asymmetry is there), will the Dark matter asymmetry be a prediction?
Thanks!