Observation of the decay Xi(0)->Sigma(+)e(-)(nu)over-bar-(e)

Citation
A. Affolder et al., Observation of the decay Xi(0)->Sigma(+)e(-)(nu)over-bar-(e), PHYS REV L, 82(19), 1999, pp. 3751-3754
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
82
Issue
19
Year of publication
1999
Pages
3751 - 3754
Database
ISI
SICI code
0031-9007(19990510)82:19<3751:OOTDX>2.0.ZU;2-L
Abstract
We present the first observation of Xi(0) beta decay, using the KTeV beam l ine and detector at Fermilab. We have identified 176 beta decay events afte r subtracting a 7 event background. Normalization to 41024 simultaneously c ollected Xi(0) --> Lambda(0)pi(0) decays yields a branching ratio of Gamma( Xi(0) --> Sigma(+) e(-)<(nu)over bar>(e))/Gamma(total) = (2.71 +/- 0.22(sta tistical) +/- 0.31(systematic)) X 10(-4). The flavor symmetric quark model calculation agrees with this result.