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Study of rare muon decay modes with the crystal box

Conference ·
OSTI ID:5264177
; ; ; ; ; ; ; ; ;
We report on a search for the lepton family-number-nonconserving decays ..mu../sup +/..-->..e/sup +/e/sup -/e/sup +/, ..mu../sup +/..-->..e/sup +/..gamma.., and ..mu../sup +/..-->..e/sup +/..gamma gamma.., using the Crystal Box detector at LAMPF. The experiment was run in the stopped muon channel at LAMPF during the winter and summer of 1984. Muons were stopped in the middle of a detector system consisting of a cylindrical drift chamber, a plastic scintillator hodoscope, and a segmented array of sodium iodide crystals. The sodium iodide surrounded the hodoscope and drift chamber. Events consistent with any of the above decays were recorded. The off-line data analysis imposed requirements on the timing, vertex location, and energy and momentum conservation for each event. Radioactive sources, conventional muon decay spectra, and photons from the process ..pi../sup -/p..-->..n..gamma.. and ..pi../sup -/p..-->..n..pi../sup 0/ were used to provide energy calibration and resolution estimates. The inner bremsstrahlung processes ..mu../sup +/..-->.. e/sup +/..gamma nu..anti..nu.. and ..mu../sup +/..-->..e/sup +/e/sup -/e/sup +/..nu..anti..nu.. were observed at the expected rates. Details of the detector, the data analysis, and our latest bounds for the branching ratios will be presented. 33 figs.
Research Organization:
Los Alamos National Lab., NM (USA); Chicago Univ., IL (USA); Stanford Univ., CA (USA); Temple Univ., Philadelphia, PA (USA)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
5264177
Report Number(s):
LA-UR-85-2346; CONF-850414-1; ON: DE85015678
Country of Publication:
United States
Language:
English

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Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BRANCHING RATIO
CALIBRATION
COMPUTERIZED SIMULATION
DATA
DECAY
ELECTRONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
GAMMA SPECTRA
HODOSCOPES
INFORMATION
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MUONS
MUONS PLUS
NAI DETECTORS
NUMERICAL DATA
PARTICLE DECAY
PHOSPHORS
PHOTONS
PLASTIC SCINTILLATORS
POSITRONS
RADIATION DETECTORS
SCINTILLATION COUNTERS
SIMULATION
SOLID SCINTILLATION DETECTORS
SPECTRA