Search for the Decay of D+ and D_s+ Mesons to Three Charged Kaons by P.L. Frabetti et al.
Abstract: We report the results of a search for the doubly Cabibbo suppressed decays D+ --> K+ K- K+ and D+ --> phi K+, and the singly Cabibbo suppressed decays D_s+ --> K+ K- K+ and D_s+ --> phi K+. Our measurements are all consistent with zero branching ratio, and we set upper limits on the relative D+ branching ratios: B(phi K+) / B(phi pi+) < 0.021, B(K+ K- K+) / B(phi pi+) < 0.025, B(K+ K- K+) / B(K- pi+ pi+) < 0.0016, and the relative D_s+ branching ratios: B(phi K+) / B(phi pi+) < 0.013, B(K+ K- K+) / B(phi pi+) < 0.016. The data were accumulated by the Fermilab high energy photoproduction experiment E687.