conservation of leptons

The conservation of leptons is a principle in physics stating that the total number of leptons—fundamental particles like electrons, muons, tau particles, and their neutrinos—remains constant in any isolated process. This means that in reactions or particle decays, leptons are neither created nor destroyed individually; instead, they are only transformed into other leptons of the same type or exchanged between particles. This rule helps scientists understand and predict how particles behave during interactions, ensuring the fundamental counts of these particles stay balanced throughout different events in the universe.