FOCUS Document 878-v1

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Measurement of the D+ and Ds+ decays into K+K-K+

Document #:
FOCUS-doc-878-v1
Document type:
Publication
Submitted by:
Eduardo Luiggi
Updated by:
Eduardo Luiggi
Document Created:
26 Aug 2005, 11:15
Contents Revised:
26 Aug 2005, 11:15
Metadata Revised:
15 Aug 2002, 11:20
Actually Revised:
26 Aug 2005, 11:19
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Abstract:
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 Ds+ --> 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: Gamma(D+ --> K-K+K+)/Gamma(D+ --> K-pi+pi+) = (9.49 +/- 2.17(statistical) +/- 0.22(systematic))x10^-4 and Gamma(Ds+ --> K-K+K+)/Gamma(Ds+ --> K-K+pi+) = (8.95 +/- 2.12(statistical) +2.24(syst.) -2.31(syst.))x10^-3.
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Published in hep-ex/0206049.
Published in Phys. Lett. B vol. 541 pg. 227.
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