The Anti-Matter Thing Is a Whole Thing, Right?

Anti-matter is a whole subtype and mesons are a pair of quark, anti-quark pair. They're not stable as we very well discussed, stable because they decay into subsequent matter. The reason now you might be thinking how don't they annihilate is because the strong nuclear force is actually preventing that. But for that quick second that it is actually there, such as in particle accelerators, we can understand their properties.