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Evolution of Elementary particles?

  1. Jun 16, 2011 #1
    Hello,

    Maybe a strange question here (I'm not 100% current with the standard model), but does the standard model say anything about a change in the ratios of fermions as the universe expands?
    (I see Generations I, II & III listed)
     
  2. jcsd
  3. Jun 16, 2011 #2

    Drakkith

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    Staff: Mentor

    The generations don't refer to when they were created, as in a timeframe, but refers to the energy required to create them and when we discovered them. The ratio of fermions only really changes between protons and neutrons and electrons. All other fermions decay rapidly into one of those three or into photons.
     
  4. Jun 16, 2011 #3
    Hrm..ok. Thank you for answering my question :)
     
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