The DAFNE -factory at Frascati is an e + e collider at the centre of mass

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The DAFNE Φ-factory at Frascati is an e+e collider at the centre of mass energy equal to the ϕ mass. Calculate the ratio between the annihilation rates into K+K and K00 neglecting the mass difference between charged and neutral kaons. Is this a good approximation? Considering the case K00 calculate the relative frequency of K0K01,  K0K02  and K0K02.

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