Observation of the Cabibbo-Suppressed Decay Ξ_{c}
Phys Rev Lett
; 84(9): 1857-61, 2000 Feb 28.
Article
in En
| MEDLINE
| ID: mdl-21923211
ABSTRACT
We report the first observation of the Cabibbo-suppressed charm baryon decay Ξ_{c}^{+}âpK^{-}π^{+}. We observe 150±22±5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Σ^{-} beam. The branching fractions of the decay relative to the Cabibbo-favored Ξ_{c}^{+}âΣ^{+}K^{-}π^{+} and Ξ_{c}^{+}âΞ^{-}π^{+}π^{+} are measured to be B(Ξ_{c}^{+}âpK^{-}π^{+})/B(Ξ_{c}^{+}âΣ^{+}K^{-}π^{+})=0.22±0.06±0.03 and B(Ξ_{c}^{+}âpK^{-}π^{+})/B(Ξ_{c}^{+}âΞ^{-}π^{+}π^{+})=0.20±0.04±0.02, respectively.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2000
Document type:
Article