Full Idea
The phenomenon of charge-parity (CP) violation says that under certain circumstances antiparticles decay at different rates from their matter counterpart. ...This might explain matter's dominance in the universe, but the effect is too small.
Gist of Idea
CP violation shows a decay imbalance in matter and antimatter, leading to matter's dominance
Source
New Scientist writers (New Scientist articles [2013], 2015.05.23)
Book Reference
-: 'New Scientist magazine' [ 2013], p.31
A Reaction
Physicists are currently studying CP violations, hoping to explain why there is any matter in the universe. This will not, I presume, explain why matter and antimatter arrived in the first place.
Related Idea
Idea 19482 Current physics says matter and antimatter should have reduced to light at the big bang [New Sci.]