I was thinking about Baryon asymmetry just to mess around with ideas and thought about this. Could it be that all the anti-matter decayed into matter?

  • $\begingroup$ General tip: Check the right margin for duplicates. $\endgroup$
    – Qmechanic
    Nov 5, 2017 at 17:57
  • $\begingroup$ Decay is involved from a higher energy state to a lower energy state, and hydrogen has exactly the same energy as antihydrogen, within the standard model of particle physics. you are talking of lepton number and baryon number violations: quarks have to become antiquarks and the electron a positron $\endgroup$
    – anna v
    Nov 5, 2017 at 18:14
  • $\begingroup$ Not necessarily, I guess. Those can be conserved by the formation of other particles. $\endgroup$ Nov 6, 2017 at 10:35

1 Answer 1


That would also require a change of sign in total lepton number. However, theories claiming only $B-L$ need be conserved are consistent with the process that you propose. Sadly, there is still no proof of leptoquarks.


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