Observation of the Decay {xi}{sup 0}{yields}{sigma}{sup +}{mu}{sup -}{nu}{sub {mu}}

The {xi}{sup 0} muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the {xi}{sup 0} beta decay mode and yields a value for the ratio of decay rates {gamma}({xi}{sup 0}{yields}{sigma}{su...

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Bibliographic Details
Published in:Physical review letters 2005-08, Vol.95 (8)
Main Authors: Abouzaid, E., Blucher, E., Glazov, A., Kessler, R., Monnier, E., Prasad, V., Solomey, N., Wah, Y.W., Winstein, B., Winston, R., Worcester, E. T., Worcester, M., Alexopoulos, T., Erwin, A.R., Ping, H., Velissaris, C., Arenton, M., Cox, B., Golossanov, A., Ledovskoy, A.
Format: Article
Language:English
Subjects:
BETA DECAY
ELECTRON NEUTRINOS
ELECTRONS
FERMILAB
FLAVOR MODEL
MUON NEUTRINOS
MUONS MINUS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SEMILEPTONIC DECAY
SIGMA PLUS PARTICLES
SU-3 GROUPS
XI NEUTRAL PARTICLES
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Summary:The {xi}{sup 0} muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the {xi}{sup 0} beta decay mode and yields a value for the ratio of decay rates {gamma}({xi}{sup 0}{yields}{sigma}{sup +}{mu}{sup -}{nu}{sub {mu}})/{gamma}({xi}{sup 0}{yields}{sigma}{sup +}e{sup -}{nu}= {sub e}) of [1.8{sub -0.5}{sup +0.7}(stat){+-}0.2(syst)]x10{sup -2}. This is in agreement with the SU(3) flavor symmetric quark model.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.081801