Search for proton decay into e++ pi 0 in the IMB-3 detector.

R Becker‐Szendy ,G Thornton,J Schultz,S Matsuno,C B Bratton,R Svoboda,H W Sobel,J M Losecco,J L Stone,M Goldhaber,W Gajewski,C Mcgrew,R Claus,P G Halverson,W R Kropp,T J Haines,D Sinclair,L R Price ,L Sulak ,D Kiełczewska ,M S Mudah,D Casper,J C Van Der Velde,T W Jones,F Reines,D R Cady,J A J Matthews ,S T Dye,M F Crouch ,J G Learned

doi:10.1103/physrevd.42.2974

Search for proton decay into e++ pi 0 in the IMB-3 detector.

R Becker‐Szendy , G Thornton + Show 28 more

https://doi.org/10.1103/physrevd.42.2974

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Journal: Physical review. D, Particles and fields	Publication Date: Nov 1, 1990
Citations: 39

Affiliation: University of Hawaiʻi at Mānoa, University of Hawaii System, Honolulu University, University of Michigan–Ann Arbor, University of California, Irvine, Cleveland State University, Louisiana State University, Brookhaven National Laboratory, University of Maryland, College Park, University of Warsaw, University College London, University of Notre Dame, Case Western Reserve University

#Days Of Live Time #Fiducial Volume + Show 8 more

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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 1990DOI:https://doi.org/10.1103/PhysRevD.42.2974©1990 American Physical Society

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