5 ms·
My baseless speculation of choice is that if antimatter is basically regular matter moving backwards in time, all the antimatter we expect to see from the big b
by philipov 5y ago
My baseless speculation of choice is that if antimatter is basically regular matter moving backwards in time, all the antimatter we expect to see from the big bang went flying out into negative time, into an anti-universe temporally disjoint from our own.
- scotty79 5y agoThat would mean we should see the events where anti-particle flies, absorbs (or emits, or does none of that) some energy and turns into normal particle. Unless the moment of big bang was totally unique time when such things happened.
- ben_w 5y agoIsn’t that a valid description of both pair-creation and pair-annihilation events? (Serious question; I’m not a professional physicist)
- scotty79 5y agoNo. Pair creation is two photons disappearing and turning into particle and antiparicle. And annihilation is turning particle and antiparticle into two photons. When particle and photon meet the result is particle and photon just moving differently. You probably might think of this as old particle and photon disappearing and new paricle and new photon appearing.
- whatshisface 5y agoAntimatter isn't matter flying backwards in time, it just has some symmetries that make it appear so in some cases.
- philipov 5y agoCould you please explain why it is wrong to think of the appearance caused by those symmetries as real?
- filmor 5y agoI think that the experimentally found CP-violations show that anti-matter doesn't necessarily behave exactly the same as time-reversed matter.
- scotty79 5y agoHow can you tell? I thought you cand pretty much swap matter with anti-matter and reverse time and all the physics seems the same.
- ben_w 5y agoAlmost but not quite: https://en.wikipedia.org/wiki/CPT_symmetry https://en.wikipedia.org/wiki/CPT_symmetry https://en.wikipedia.org/wiki/CP_violation https://en.wikipedia.org/wiki/CP_violation