In particle physics the semileptonic decay of a hadron is a decay caused by the weak force in which one

lepton In particle physics, a lepton is an elementary particle of half-integer spin ( spin ) that does not undergo strong interactions. Two main classes of leptons exist: charged leptons (also known as the electron-like leptons or muons), and neutr ...

(and the corresponding neutrino) is produced in addition to one or more hadrons. An example for this can be :: → + + This is to be contrasted with purely hadronic decays, such as → + , which are also mediated by the weak force. Semileptonic decays of neutral kaons have been used to study kaon oscillations.

See also