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An italic capital L, counting electrons, muons and taus.
Also known as: Lepton number, L quantum number, Leptonic charge
Lepton number counts leptons, and it is conserved separately for each of the three families — which neutrino oscillation violates, since a muon neutrino arriving as an electron neutrino has changed family. Total lepton number still appears to hold.
Denotes lepton number, assigned +1 to each lepton and −1 to each antilepton.
Contexts: Laboratory
Is conserved separately per family in the Standard Model, a rule that neutrino oscillation demonstrably breaks.
Contexts: Laboratory
Would be violated by neutrinoless double beta decay, which has been searched for and not observed.
Contexts: Laboratory
An italic capital letter L, a vertical stroke with a horizontal foot to the right.