Evolution of Elementary particles?

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The standard model does not indicate that the ratios of fermions change as the universe expands. The generations of fermions (I, II, III) are based on the energy required for their creation rather than their chronological emergence. The primary fermions that persist are protons, neutrons, and electrons, while other fermions decay quickly into these or into photons. The discussion highlights the stability of these fundamental particles despite cosmic expansion. Understanding these principles is essential for grasping the behavior of elementary particles in the universe.
Aztral
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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)
 
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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.
 
Hrm..ok. Thank you for answering my question :)
 

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