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Search for multitrack nucleon decay

Journal Article · · Phys. Rev. Lett.; (United States)
; ; ; ; ; ; ; ; ; ;
We report new limits on the nucleon lifetime obtained with the Irvine-Michigan-Brookhaven water Cherenkov detector. Techniques in track fitting, particle identification, and invariant-mass reconstruction provide information about multitrack events which leads to a significant reduction in background for most decay modes. Data obtained during the initial 417-day run and during the subsequent 69-day run with enhanced light collection are discussed. A background subtraction is made, yielding 90%-confidence-level lower bounds on the nucleon partial lifetime per branching fraction in the range (0.6--46.0) x 10/sup 31/ yr for 23 decay channels.
Research Organization:
The University of California, Irvine, Irvine, California 92717
OSTI ID:
6646788
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:22; ISSN PRLTA
Country of Publication:
United States
Language:
English

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Related Subjects

645101 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSONS
DATA
DECAY
ELECTRONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRONS
INFORMATION
KAONS
KAONS NEUTRAL
LEPTONS
LIFETIME
LIMITING VALUES
MASSLESS PARTICLES
MESONS
MUONS
MUONS MINUS
MUONS PLUS
NEUTRINOS
NEUTRONS
NUCLEONS
NUMERICAL DATA
OMEGA-783 MESONS
PARTICLE DECAY
PARTICLE TRACKS
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
POSITRONS
PROTONS
PSEUDOSCALAR MESONS
RHO-770 MESONS
SEMILEPTONIC DECAY
STRANGE MESONS
STRANGE PARTICLES
VECTOR MESONS
WEAK PARTICLE DECAY