Search for proton decay into e++π0 in the IMB-3 detector

R. Becker-Szendy et al.
Phys. Rev. D 42, 2974 – Published 1 November 1990
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Abstract

We report the results of a search for proton decay into e++π0 in the 6800-ton IMB-3 water Čerenkov detector. During 376 days of live time no events consistent with this decay were found in the 3300 ton fiducial volume. From this observation we derive a limit on the partial lifetime to be τB>2.4×1032 yr (90% C.L.), which, combined with our previous result of 3.1×1032 yr, provides a limit of 5.5×1032 yr. The general features of the observed contained events are compatible with those expected from atmospheric neutrino interactions.

  • Received 4 May 1990

DOI:https://doi.org/10.1103/PhysRevD.42.2974

©1990 American Physical Society

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Vol. 42, Iss. 9 — 1 November 1990

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