| 21. | In the Standard Model, quarks and leptons have " renormalization group equation:
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| 22. | The Standard Model counts six flavours of quarks and six flavours of leptons.
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| 23. | However, this would still violate total lepton number.
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| 24. | The lepton is either an electron or a muon.
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| 25. | Examples of fermions are quarks, leptons and baryons.
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| 26. | Effectively, all baryonic matter will have been changed into photons and leptons.
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| 27. | At such high energies quarks and leptons are likely all massless as well.
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| 28. | Leptons have various intrinsic properties, including electric charge, spin, and mass.
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| 29. | The quarks and leptons develop masses given approximately by
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| 30. | Leptons do not interact via the strong interaction.
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