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Measurements of Relative Branching Ratios of $$\Lambda^+_c$$ Decays into States Containing $$\Sigma$$

Journal Article · · Phys.Lett.B
We have studied the Cabibbo suppressed decay Λ c + → Σ + K *0 (892) and the Cabibbo favored decays Λ c + → Σ + K + K - , Λ c + → Σ + φ and Λ c + → Ξ *0 (Σ + K - ) K + and measured their branching ratios relative to Λ c + → Σ + π + π - to be (7.8 ± 1.8 ± 1.3)%, (7.1 ± 1.1 ± 1.1)%, (8.7 ± 1.6 ± 0.6)% and (2.2 ± 0.6 ± 0.6)%, respectively. The first error is statistical and the second is systematic. We also report two 90% confidence level limits Γ(Λ c + → Σ - K + π + )/Γ(Λ c + → Σ + K *0 (892)) < 35% and Γ(Λ c + → Σ + K + K - ) NR /Γ(Λ c + → Σ + π + π - ) < 2.8%.
Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Organization:
FOCUS
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1892264
Report Number(s):
FERMILAB-PUB-02-113-E; arXiv:hep-ex/0206013; oai:inspirehep.net:587985
Journal Information:
Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 540
Country of Publication:
United States
Language:
English

References (6)

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journal May 2002
Observation of Cabibbo-suppressed and W-exchange Λ c + baryon decays journal January 2002
Description and performance of the Fermilab E687 spectrometer
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journal September 1992
Reconstruction of Vees, Kinks, Ξ−'s, and 's in the FOCUS spectrometer
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journal May 2002
Study of the decays Λ c + → Ξ 0 K + , Λ c + → Σ + K + K − , and Λ c + → Ξ − K + π + journal October 1993
A new measurement of the Ξc+ lifetime journal December 2001

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS