# Neutral pions

by dEdt
Tags: neutral, pions
 P: 186 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?
 HW Helper Sci Advisor Thanks P: 9,146 The neutral pions are decay products from scattering. There are plenty of examples online of Feynman diagrams involving pions.
 P: 925 the decay of neutral pions into two photons happens through the anomaly in divergence of axial vector current.the decay has a triangle diagram. http://prola.aps.org/abstract/PR/v177/i5/p2426_1 it is available freely here. http://astrophysics.fic.uni.lodz.pl/...pdf/12/068.pdf

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