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Matter-antimatter annihilation would produce gamma rays that are detectable. I believe there was a study that went looking for that but didn't find anything.
by shepardrtc 8y ago
Matter-antimatter annihilation would produce gamma rays that are detectable. I believe there was a study that went looking for that but didn't find anything.
- AnimalMuppet 8y agoTo clarify (presuming I understand correctly): Antimatter might have negative gravity, but dark matter can't be antimatter, because we'd see the gamma rays from the collisions.
- mrfusion 8y agoBut if they’re repelling each other and for billions Of years. Why should there be any collisions?
- AnimalMuppet 8y agoBecause it's still in places where there's interstellar gas (if this theory is right). And repelling each other gravitationally doesn't work very well at the molecular level.
- DonHopkins 8y agoMaybe there's a matter/antimatter Leidenfrost effect? https://en.wikipedia.org/wiki/Leidenfrost_effect https://en.wikipedia.org/wiki/Leidenfrost_effect