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

Journal Article · Thu Nov 01 00:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.2974· OSTI ID:6144016

Becker-Szendy, R; Bratton, C B; Cady, D R; Casper, D; Claus, R; Crouch, M; Dye, S T; Gajewski, W; Goldhaber, M; Haines, T J; Halverson, P G; Jones, T W; Kielczewska, D; Kropp, W R; Learned, J G; LoSecco, J M; McGrew, C; Matsuno, S; Mudan, M S; Price, L ; Reines, F; Schultz, J; Sinclair, D; Sobel, H W; Stone, J L; Sulak, L R; Svoboda, R; Thornton, G; van der Velde, J C ^[1]

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1. The University of California; Irvine; Irvine; CA (USA) The University of Michigan; Ann Arbor; MI (USA) Brookhaven National Laboratory; Upton; NY (USA) Boston University; Boston; MA (USA) The University of Hawaii; Honolulu; Hawaii (USA) University College; London (United Kingdom) Warsaw University; Warsaw (Poland) Cleveland State University; Cleveland; OH (USA) The University of Notre Dame; Notre Dame; IN (USA) Case Western Reserve University; Cleveland; OH (USA) Louisiana State University; Baton Rouge; LA (USA) The University of Maryland; College Park; MD (USA)

We report the results of a search for proton decay into {ital e}{sup +}+{pi}{sup 0} in the 6800-ton IMB-3 water Cherenkov 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 {tau}/{ital B}{gt}2.4{times}10{sup 32} yr (90% C.L.), which, combined with our previous result of 3.1{times}10{sup 32} yr, provides a limit of 5.5{times}10{sup 32} yr. The general features of the observed contained events are compatible with those expected from atmospheric neutrino interactions.

• OSTI ID: 6144016
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSONS
CHERENKOV COUNTERS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
LEPTONS
LIFETIME
MASSLESS PARTICLES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
MUONS
MUONS PLUS
NEUTRINOS
NEUTRONS
NUCLEONS
PARTICLE MODELS
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
POSITRONS
PROTONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SUPERSYMMETRY
SYMMETRY
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES