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Neutral particle oscillations / quantum number conservation

  1. Oct 18, 2015 #1


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    Hello everyone,
    Why don't neutral particle oscillations have to obey conservation of (quark) flavor quantum numbers, with the example of neutral Kaon oscillations?
  2. jcsd
  3. Oct 18, 2015 #2


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    Because weak interactions are not flavour diagonal. In general, you would expect mixing among particles whenever they have the same gauge quantum numbers unless there is a symmetry to forbid it.
  4. Oct 18, 2015 #3


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    Why should they? There is no conservation law for quark flavors, the weak interaction can change them. The oscillations happen via the weak interaction.

    Edit: Too slow.
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