The state (1232) has isospin I = 3/2. (1) What is the ratio between the decay rates

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The state Δ(1232) has isospin I = 3/2.
(1) What is the ratio between the decay rates Δ0 → pπand Δ0 → nπ0?
(2) What would it have been if I = 1/2?

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