Which of the following processes are allowed in electromagnetic interactions and which are allowed in weak interactions
Question:
Which of the following processes are allowed in electromagnetic interactions and which are allowed in weak interactions via the exchange of a single W± or Z0?
(a) K+ → π0 + e+ + νe, (b) K+ → π+ + e+ + e−, (c) Σ0 → Λ0 + e+ + e−, (d) Σ0 → n + νe + ν̅e.
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