Doubly and singly Cabibbo suppressed charm decays into the K+π-π+ final state

Abstract Branching ratios and upper limits at 90% confidence level for D + and D s + → K + π − π + decays collected in Fermilab photoproduction experiment E-687 are reported. The D + results are: Γ(D + → K + π − π + ) Γ(D + → K − π + π + ) = (7.2 ± 2.3 ± 1.7) × 10 −3 , Γ(D + → K ∗0 (892)π + ) Γ(D + → K − π + π + ) , and Γ(D + → K + ϱ 0 (770)) Γ(D + → K − π + π + ) . The D s + results are: Γ(D s + → K + π − π + ) Γ(D s + → Φ(1020)π + ) = 0.28 ± 0.06 ± 0.05 , Γ(D s + → K ∗0 (892)π + Γ(D s + → Φ(1020)π + ) = 0.18 ± 0.05 ± 0.04 , and Γ(D s + → K + ϱ 0 (770)) Γ(D s + → Φ(1020)π + ) .