Recent content by Mathilda

I understand that have very short lifetimes. But how are they able to assemble at all? Or is -onium just an expression for the state just before a particle and it's antiparticle annihilate each other?

I've not been able to find any evidence for stable onium. But since it's an particle withit's own anti-particle it shouldn't be able to exist at all. When it comes to positronium, it's an elektron and a positron that circulates around a common center of mass. Is it the common center of mass that...

Homework Statement How can an onium exist? Since it is a particle with its own antiparticle, how can it even exist? Shouldn't the particle and the anti-particle annihilate each other? Homework EquationsThe Attempt at a Solution

Homework Statement How does the pi-meson (π0) work without annihilating itself? Homework Equations |π0 〉1/√2 〉- {|uu − |dd} u= anti-upquark d= anti-downquark The Attempt at a Solution I do understand that it is a superposition, but why does it work when it is a partice with its own...