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Evidence of the Cabibbo suppressed decay Lambda(c)+ ---> p K- K+

Journal Article · · Phys.Lett.B
We report evidence for the Cabibbo-suppressed decay of the charm baryon Λ c + into the final state pK - K + . The analysis is performed on data collected by high energy photoproduction experiment E687 during the 1990–1991 Fermilab fixed target run. The branching ratio of the decay Λ c + → pK - K + relative to the non-suppressed Λ c + → pK - π + is measured to be BR( pK - K + / pK - π + ) = 0.096 ± 0.029 ± 0.010. The upper limit of the decay into pø relative to the inclusive pK - K + decay is measured to be BR( pø / pK - K + < 58% at the 90% confidence level.
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:
E687
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1893497
Report Number(s):
FERMILAB-PUB-93-183-E; oai:inspirehep.net:356600
Journal Information:
Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 314
Country of Publication:
United States
Language:
English

References (4)

Measurement of various decay modes of charmed particlesD 0,D +,D s + andΛ s c journal March 1990
Measurement of the Λ c + lifetime journal March 1993
Description and performance of the Fermilab E687 spectrometer
  • Frabetti, P. L.; Giordano, V.; Molinari, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 320, Issue 3 https://doi.org/10.1016/0168-9002(92)90948-4
journal September 1992
The microstrip vertex detector for the E687 experiment at tevatron
  • Bellini, G.; Giammarchi, M.; Manfredi, P. F.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 252, Issue 2-3 https://doi.org/10.1016/0168-9002(86)91206-4
journal December 1986

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS