Measurement Of The Decays D0 --> pi+ pi+ pi- pi-, D0 --> KK and Ds --> phi pi+ pi+ pi-
by P.L. Frabetti et al.
Abstract. We present measurements of the branching ratios for two Cabibbo suppressed decays of the D0 meson, D0 --> pi+ pi+ pi- pi- and D0 --> K-K+, and for the decay Ds --> phi pi+ pi+ pi-. The physics signals were extracted from a data sample consisting of 60 million triggers, collected by Fermilab Photoproduction Experiment E687 from December 1987 to February 1988. The relative branching ratios are measured to be: Gamma(D0 --> 4 pi) / Gamma(D0 --> K 3pi) = 0.108 +- 0.024 +- 0.008, Gamma(D0 --> KK) / Gamma(D0 --> K pi) = 0.138 +- 0.027 +- 0.010 and Gamma(Ds --> phi 3pi) / Gamma(Ds --> phi pi) = 0.58 +- 0.20 +- 0.10.