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In particle physics the semileptonic decay of a hadron is a decay caused by the weak force in which one lepton (and the corresponding neutrino) is produced in addition to one or more hadrons. An example for this can be
K0
→
e−
+
ν
e +
π+
This is to be contrasted with purely hadronic decays, such as
K0
→
π+
+
π−
, which are also mediated by the weak force.
Semileptonic decays of neutral kaons have been used to study kaon oscillations.
