Abstract

A search for nucleon decay into a charged lepton and mesons was performed in the Fréjus detector. No evidence for a signal was found . 90% C.L. limits on nucleon partial lifetime in modes with a charged lepton in the final state are given. A search for neutron-antineutron oscillation also gives negative results. A 90% C.L. limit on the free neutron-antineutron oscillation time is given.

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