Abstract
We have applied the dispersion method to the problem of neutral-pion decay. It is shown that a pion-pion $P$-wave resonance can produce a large effect in the decay matrix element. The contribution is related to the semifundamental constant which determines the rate of photoproduction of pions from pions. The contribution of a strong three-pion state is also considered.
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Schedule a callMore From: Physical review. A, Atomic, molecular, and optical physics
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