Results from the Fréjus experiment for nucleon decay modes into anti-neutrino + meson

Abstract With the Frejus 900 ton calorimeter (550 ton fiducial), a search for nucleon decay events into anti-neutrino plus meson has been performed. No signal is found for a sensitivity of 1.3 kiloton × year. Lower lifetime limits for various decay modes range from 0.9 to 2.9 10 31 years (at 90% C.L.).