Anti-matter formation and matter formation were equal and opposite relative occurrences. Matter formation occurred in dimensional space. Anti-matter formation, by definition, occurred in anti-dimensional space. By definition.

Definition = Equal and opposite relativity

space is defined relative to space which is equal and opposite; anti-space.

Experimental evidence?
Inflation occurs when the interface of dimensional and anti-dimensional singularities meet up.

Dark energy is the equal and opposite reaction to anti-dark energy.

Dark matter is the equal and opposite reaction to anti-dark matter.

Which can all be calculated as a function of entropy.