- in a process involving elementary particles, the total number of leptons minus the total number of antileptons.
Origin of lepton number
First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- physics a quantum number describing the behaviour of elementary particles, equal to the number of leptons present minus the number of antileptons. It is thought to be conserved in all processesSymbol: l
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