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

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

2002-06-20

arxiv.org/abs/hep-ex/0206049v1

Phys.Lett.B541:227-233,2002

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 8 figures

Scientific paper

10.1016/S0370-2693(02)02240-2

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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