Abstract
If neutrinos are their own antiparticles, then in the lepton sector the effects of both CP conservation and CP violation are quite different from what they are in the quark sector. To the extent that CP is conserved, the neutrinos are CP eigenstates possessing intrinsic CP parities. Consequences of these parities are described. If CP is violated, then, for a given number of generations, the leptonic weak interaction can contain more CP-violating phases than can the quark weak interaction. Indeed, the leptonic interaction can already contain a CP-violating phase when there are only two generations. The origin of the additional leptonic CP-violating phases is explained. Examples of CP-violating effects produced by these phases, and the sizes of these effects, are discussed.
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