Semileptonic decay
In particle physics the semileptonic decay of a hadron refers to a decay through the weak interaction in which one lepton (and the corresponding neutrino) is produced in addition to one or more hadrons.
An example of a semileptonic decay is
 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.
See also
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