Search for the lepton-flavor-violating decay K sub L sup 0 yields. mu. e
This thesis presents results on the search for the lepton-flavor-violating decay K{sub L}{sup 0} {yields} {mu}e. This decay is forbidden in the Standard Model while many alternate models allow it at various rates. These data were collected using a new kaon spectrometer at the Brookhaven National Laboratory Alternating Gradient Synchrotron facility during May, 1987. The sensitivity of the data set is calculated from approximately one million effective K{sub L}{sup 0} {yields} {pi}{sup +}{pi}{sup {minus}} decays. Two K{sub L}{sup 0} {yields} {mu}{mu} events were identified, a quantity consistent with the known branching ratio for this decay. No candidate K{sub L}{sup 0} {yields} {mu}e events were detected and a 90% confidence level limit on the branching ratio of B(K{sub L}{sup 0} {yields} {mu}e) < 0.98 {times} 10{sup {minus}8} was established. These results represent a significant improvement over the previous limits and serve to constrain some models that allow for lepton flavor violation. The sensitivity of this result probes, through virtual effects, a mass scale on the order of 20 TeV.
- Research Organization:
- California Univ., Los Angeles, CA (USA)
- OSTI ID:
- 6990427
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645100 -- High Energy Physics-- Particle Interactions & Properties-Experimental
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BROOKHAVEN AGS
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
CYCLIC ACCELERATORS
DATA
DATA ANALYSIS
DECAY
EXPERIMENTAL DATA
FLAVOR MODEL
HADRON REACTIONS
INFORMATION
KAON REACTIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEASURING METHODS
MESON REACTIONS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE MODELS
QUARK MODEL
SYNCHROTRONS