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I Can a (uuu) baryon exist? If so, why wouldn't protons decay

  1. Feb 1, 2017 #1
    Is this some sort of issue with color or another quantity that needs to be conserved?
  2. jcsd
  3. Feb 1, 2017 #2


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  4. Feb 1, 2017 #3


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    (uuu) is heavier than the lightest (uud) baryon. The reason comes from quantum mechanics: The total wave function has to be antisymmetric under the exchange of up-quarks. (uud) can have spin 1/2, but (uuu) cannot. A larger spin leads to a larger mass.
  5. Feb 2, 2017 #4
    I suppose that makes sense, thanks for the reply!
  6. Feb 2, 2017 #5
    I naively assumed that baryon would be the lightest baryon, lighter than a proton, so I assumed it would eventually decay to the lowest mass. The other reply explained why this would not be the case.
    Thanks for the reply!
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