Greetings, I'm curious about parity conservation in the decay[tex]\eta \rightarrow \gamma \gamma[/tex]. The [tex]\eta[/tex] has odd parity, while the product of the two photon parities (each is odd) is even. Now, parity is conserved in the EM interactions, so there must be a factor of (-1) coming in from orbital angular momentum factors--but the two photon final state has no orbital angular momentum. What am I missing here?(adsbygoogle = window.adsbygoogle || []).push({});

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# Homework Help: Parity in the \eta to two photon decay

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