9 v 1 1 4 Ja n 20 04 Measurements of Six - Body Hadronic Decays of the D 0
نویسندگان
چکیده
Using data collected by the FOCUS experiment at Fermilab, we report the discovery of the decay modes D0 → K−π+π+π+π−π− and D0 → π+π+π+π−π−π−. With a sample of 48 ± 10 reconstructed D0 → K−π+π+π+π−π− decays and 149 ± 17 reconstructed D0 → π+π+π+π−π−π− decays, we measure the following relative branching ratios: Γ(D0 → K−π+π+π+π−π−)/Γ(D0 → K−π+π+π−) = (2.70 ± 0.58± 0.38) × 10−3 Γ(D0 → π+π+π+π−π−π−)/Γ(D0 → K−π+π+π−) = (5.23 ± 0.59 ± 1.35) × 10−3 Γ(D0 → π+π+π+π−π−π−)/Γ(D0 → K−π+π+π+π−π−) = 1.93 ± 0.47 ± 0.48 The first errors are statistical and the second are systematic. The branching fraction of the Cabibbo suppressed six-body decay mode is measured to be a factor of two higher than the branching fraction of the Cabibbo favored six-body decay mode.
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