A priori mixings of eigenstates in physical states are quantum mechani
cal effects well known in several realms of physics. The possibility t
hat such effects are also present in particle physics, in the form of
flavor and parity mixings, is studied. An application to weak radiativ
e decays of hyperons is discussed. It is suggested that this scheme ma
y also be present in non-leptonic and rare mode decays as the enhancem
ent phenomenon.