Antimatter's role in the architecture of the universe

In summary: The CP phase in the CKM matrix is too small to generate an asymmetry as large as a 100% matter universe would suggest.Elsewhere on PF it has been argued that there would be some pretty stong evidence if there were other systems made of antimatter, notably:- a lot of hard radiation at the matter-antimatter interfaces, and- Earth-based detection of anti-matter cosmic particles. No, I'm not claiming that this is not true. However, the evidence presented does not seem to support the claim that there are large amounts of antimatter in the universe.
  • #36
Of course "extremely unlikely" and "observationally excluded" are two different things. Usually it works out as expected, but every once in a while you spot a coelacanth. One of the most recent astrophysical surprises was planets orbiting pulsars.

Anyway, AMS-02 will settle things one way or the other. It's been given the green light for STS-134, whenever that will happen.
 
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  • #37
Vanadium 50 said:
Of course "extremely unlikely" and "observationally excluded" are two different things.
They're not different at all from where I'm standing. Experimental results are never perfect. There are always errors. And thus 'observationally excluded' always breaks down to 'extremely unlikely'.

Vanadium 50 said:
Usually it works out as expected, but every once in a while you spot a coelacanth. One of the most recent astrophysical surprises was planets orbiting pulsars.
This would be more than a little bit different than spotting a coelacanth.
 
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