A search for the rare decay K sup + yields. pi. sup +. nu. nu
Technical Report
·
OSTI ID:5929933
This thesis describes an experimental search for the weak decay K{sup +} {yields} {pi}{sup +}{nu}{bar {nu}} performed at Brookhaven National Laboratory during the Winter of 1989 using the E787 Spectrometer designed expressly for this purpose. The first-order contribution to this decay cancels exactly via the Glashow-Iliopoulos-Maiani (GIM) Mechanism. However, the second-order process is expected to give a branching ratio between .6 {yields} 6 {times} 10{sup {minus}10} in the Standard Model. The predicted rate for this process is theoretically well determined; the uncertainty is due to the experimental input parameters of the Model. We find no candidate events in a sample of 1.12 {times} 10{sup 11} kaon decays and we set an upper limit on the branching ratio of 4.4 {times} 10{sup {minus}9} at the 90% confidence level. Using the same data we also set an upper limit on the process K{sup +} {yields} {pi}{sup +}f of 9.3 {times} 10{sup {minus}10} at the 90% confidence level, where f is any neutral massless weakly-interacting particle.
- Research Organization:
- Princeton Univ., NJ (USA). Dept. of Physics
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC02-76ER03072
- OSTI ID:
- 5929933
- Report Number(s):
- DOE/ER/03072-64; ON: DE91010354
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
DATA
DECAY
DETECTION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
HADRONS
INFORMATION
KAONS
KAONS PLUS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE MODELS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SHOWER COUNTERS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
DATA
DECAY
DETECTION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
HADRONS
INFORMATION
KAONS
KAONS PLUS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE MODELS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SHOWER COUNTERS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY