The neutral pion decays 99 percent of the time by the reaction 0 2. The
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The neutral pion decays 99 percent of the time by the reaction π0 → 2ϒ. The π- decays by the reaction π- → μ- + v̅μ.
(a) Assuming the π0 to consist of a uu̅ quark pair, show how the 2ϒ occurs.
(b) Why is a π0 decay to a single photon not possible?
(c) The π- is a u̅d quark combination. Draw a Feynman diagram for the π- decay.
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a The u and u annihilate via ...View the full answer
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