Observation of the decay xi0 --> sigma+ mu- nu(mu).
The xi0 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 xi0 beta decay mode and yields a value for the ratio of decay rates gamma(xi0 --> sigma+ mu- nu(mu))/gamma(xi0 --> sigma+ e- nu(e)) of [1.8(-0.5)(+0.7)(stat) +/- 0.2(syst)] x 10(-2). This is in agreement with the SU(3) flavor symmetric quark model.
Abouzaid
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The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA.
Alexopoulos
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Arenton
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Barbosa
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Barker
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Bellantoni
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Bellavance
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Blucher
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Bock
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Cheu
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Coleman
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Corcoran
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Cox
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Erwin
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Escobar
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Glazov
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Golossanov
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Gomes
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Gouffon
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Hanagaki
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Hsiung
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Huang
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Jensen
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Kessler
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Kotera
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LaDue
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Ledovskoy
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McBride
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Monnier
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Nelson
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Nguyen
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Niclasen
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Ping
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Prasad
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Qi
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Ramberg
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Ray
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Ronquest
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Santos
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Shields
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Slater
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Smith
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Solomey
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Swallow
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Toale
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Tschirhart
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Velissaris
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Wah
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Wang
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White
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Whitmore
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Wilking
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Winstein
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Winston
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Worcester
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Worcester
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Yamanaka
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Zimmerman
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Zukanovich
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