Los Alamos crystal box experiment: A search for. mu. -->. e. gamma. ,. mu. -->. e. gamma gamma. , and. mu. -->. eee
A search has been performed for the decays ..mu.. ..-->.. eee, ..mu.. ..-->.. e..gamma.., and ..mu.. ..-->.. e..gamma gamma.. with a sensitivity in the branching ratios at the level of 10/sup -10/. The experiment used a surface muon beam at LAMPF with an average intensity of 300 kHz. A total of >10/sup 11/ muon decays was examined for the present result. The detector for the experiment is the Crystal Box which consists of a cylindrical drift chamber surrounded by 396 NaI(T1) crystals. A layer of scintillation counters in front of the crystals provided timing for electrons and a veto for photons. The energy resolution for electrons and photons is approx.6% (FWHM). The position resolution of the drift chamber is 350 ..mu..m leading to a vertex cut with a rejection of 10/sup 3/ for ..mu.. ..-->.. eee. The timing resolution is approx.400 ps from the scintillators and approx.1 ns from the crystals. From these values, the eee and e..gamma gamma.. limits are expected to be background free.
- Research Organization:
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 5584804
- Report Number(s):
- CONF-8405193-
- Journal Information:
- AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 123:1; ISSN APCPC
- 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
BASIC INTERACTIONS
DATA
DECAY
DETECTION
DRIFT CHAMBERS
ELECTRONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
INFORMATION
INTERACTIONS
LEPTON NUMBER
LEPTONIC DECAY
LEPTONS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
MUONS
NAI DETECTORS
NUMERICAL DATA
PARTICLE DECAY
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RADIATIVE DECAY
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
WEAK INTERACTIONS
WEAK PARTICLE DECAY