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    Physics A-Level

    Permitted changes in strangeness

    What Permitted changes in strangeness means in Physics A-Level, as defined for AQA.

    Definition of Permitted changes in strangeness

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    Reference: AQA

    In weak interactions the permitted changes are 0, +1 or −1; changes of magnitude greater than 1 are not observed in a single weak vertex.
    AQA · Classification of particles (study guide)

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