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alemsalem
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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
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!
Dark matter/dark antimatter asymmetry is a phenomenon in which there is an unequal amount of dark matter and dark antimatter in the universe. Dark matter is believed to make up around 85% of the total matter in the universe, while dark antimatter is believed to make up only a small fraction of that. This asymmetry is one of the biggest mysteries in modern physics.
The main difference is that regular matter and antimatter are almost equal in amount in the universe, while dark matter and dark antimatter are not. This is a significant difference because regular matter and antimatter annihilate each other upon contact, but dark matter and dark antimatter do not interact in the same way.
Currently, there is no widely accepted explanation for this asymmetry. Some theories suggest that there may have been a slight preference for matter over antimatter in the early universe, leading to the unequal distribution we see today. Others propose that there may be some unknown interactions between dark matter and regular matter that could explain the asymmetry.
Scientists study dark matter/dark antimatter asymmetry through various methods, including astronomical observations, particle accelerator experiments, and theoretical modeling. These approaches help us understand the properties and behavior of dark matter and dark antimatter, and how they may differ from regular matter and antimatter.
Dark matter and dark antimatter are believed to play a crucial role in the structure and evolution of the universe. Understanding their asymmetry can provide insights into the fundamental nature of the universe and help us solve some of the biggest mysteries in physics, such as the origin of mass and the nature of gravity.