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Measurement of the $D^+$ and $$D^+_s$$ Decays into $K^+ K^- K^+$

Journal Article · · Phys.Lett.B

We present the first clear observation of the doubly Cabibbo suppressed decay D + → K - K + K + and the first observation of the singly Cabibbo suppressed decay D s + → K - K + K + . These signals have been obtained by analyzing the high statistics sample of photoproduced charm particles of the FOCUS (E831) experiment at Fermilab. We measure the following relative branching ratios: Γ ( D + → K - K + K + )/ Γ ( D + → K - π + π + )=(9.49±2.17±0.22)×10 -4 and Γ(D s + →K - K + K + )/Γ(D s + →K - K + π + )=(8.95±2.12 +2.24 -2.31 )×10 -3 , where the first error is statistical and the second is systematic.

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:
1892276
Report Number(s):
FERMILAB-PUB-02-140-E; arXiv:hep-ex/0206049; oai:inspirehep.net:588872
Journal Information:
Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 541
Country of Publication:
United States
Language:
English

References (14)

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Cherenkov particle identification in FOCUS
  • Link, J. M.; Reyes, M.; Yager, P. M.
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journal May 2002
Analysis of three D → Kππ Dalitz plots journal June 1994
Measurement of relative branching fractions for D+→K−K+K+ and Ds+→π−π+π+ decays journal May 1993
Rate Measurement of D 0 → K + π − π 0 and Constraints on D 0 − D 0 ¯ Mixing journal July 2001
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Doubly and singly Cabibbo suppressed charm decays into the K+π−π+ final state journal October 1995
Observation ofDs+→K¯0K+andDs+→K¯*0K+and an Upper Limit onDs+→K0π+. journal December 1989
Lessons from CLEO and FOCUS measurements of mixing parameters journal August 2000
Search forD0−D¯0Mixing journal May 2000
Search for the decay of D+ and D+ mesons to three charged kaons journal November 1995
Study of the DecayD0→K+π− journal April 2001
Study of the doubly Cabibbo-suppressed decayD+→φK+and the singly Cabibbo-suppressed decayDs+→φK+ journal November 1992
Analysis of the D+, Ds+ → π−π+π+ Dalitz plots journal August 1997

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