lepton number

noun

, Physics.

1. in a process involving elementary particles, the total number of leptons minus the total number of antileptons.

lepton number

noun

1. 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 processes l

Word History and Origins

Origin of lepton number¹

First recorded in 1955–60

Example Sentences

In addition, the emission of two electrons with no balancing antineutrinos would violate a symmetry principle known as the conservation of lepton number.

From Nature