Brookhaven experiment 787: The search for K/sup +/ /yields/ /pi//sup +//nu//bar nu/
Conference
·
OSTI ID:5961101
A description is presented of E-787's rare K decay spectrometer and the search for the rare decay K/sup +/ /yields/ /pi//sup +//nu//bar /nu//, expected in the Standard Model to have a branching ratio of (1 /minus/ 8) /times/ 10/sup /minus/10/. Preliminary results are presented from the 1988 run of E-787. We are able to set the 90% confidence level upper limits: BR(K/sup +/ /yields/ /pi//sup +/ /nu//bar /nu//) < 3 /times/ 10/sup /minus/8/, BR(K/sup +/ /yields/ /pi//sup +/f) < 6 /times/ 10/sup /minus/9/, BR(K/sup +/ /yields/ /pi//sup +//mu//sup +//mu//sup /minus//) < 2.1 /times/ 10/sup /minus/7/, BR(K/sup +/ /yields/ /pi//sup +/H) /times/ BR(H /yields/ /mu//sup +//mu//sup /minus//) < 1.5 /times/ 10/sup /minus/7/, BR(/pi//sup 0/ /yields/ /nu//bar /nu//) < 8 /times/ 10/sup /minus/7/, where f is any massless, neutral, weakly interacting particle and H is a Higgs boson with 2m/sub /mu// < m/sub H/ < 320 MeV/c/sup 2/. Further running is in process and we hope to accumulate an approximately ten times larger data sample in 1989. 15 refs., 4 figs., 3 tabs.
- Research Organization:
- Princeton Univ., NJ (USA). Dept. of Physics
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5961101
- Report Number(s):
- BNL-42925; CONF-8903132-8; ON: DE89015095
- 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
BOSONS
BRANCHING RATIO
DECAY
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
HIGGS BOSONS
KAONS
KAONS PLUS
KOBAYASHI-MASKAWA MATRIX
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRICES
MATRIX ELEMENTS
MEASURING INSTRUMENTS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
PULSE CIRCUITS
SPECTROMETERS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
TRIGGER CIRCUITS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
DECAY
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
HIGGS BOSONS
KAONS
KAONS PLUS
KOBAYASHI-MASKAWA MATRIX
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRICES
MATRIX ELEMENTS
MEASURING INSTRUMENTS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
PULSE CIRCUITS
SPECTROMETERS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
TRIGGER CIRCUITS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES