# Neutral pions

1. Feb 18, 2013

### dEdt

So apparently a neutral pion is a superposition of $u\bar{u}$ and $d\bar{d}$. I'm having trouble understanding what this means. I have no problem understanding how the decay products of some scattering experiment could be a superposition of these two states, but how can we treat this superposition as a single particle? And how would you draw the feynman diagram for some process involving a neutral pion?

2. Feb 18, 2013

### Simon Bridge

The neutral pions are decay products from scattering.
There are plenty of examples online of Feynman diagrams involving pions.

3. Feb 19, 2013