12. (a) Referring to Tables 44-3 and 44-4, we find the strangeness of K0is +1, while it is zero for both π+and π–. Consequently, strangeness is not conserved in this decay; K0→++ππ−does not proceed via the strong interaction. (b) The strangeness of each side is –1, which implies that the decay is governed by the
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