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Whr did the elecrons come from?

  1. Mar 1, 2007 #1
    when we talk abt BBN, we only talk abt the nucleons. whr did th electrons come from? was it just beta decay or something else?
  2. jcsd
  3. Mar 1, 2007 #2


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    Actually nucleons did not form during big-bang nucleosynthesis. The big-bang nucleosynthesis fuses them into light elements, fixing relative abundances of the elements. The nucleons formed previously in a period or process called baryogenesis. For electrons, the corresponding process is called leptogenesis.
  4. Apr 16, 2007 #3
    At what time frame do photon's appear in the current Big Bang Theory?
  5. Apr 16, 2007 #4


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    At the very beginning.
  6. Apr 16, 2007 #5
    'Leptogenesis'. That's such a beautiful word! Now to casually drop that into a conversation when buying milk.
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