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
+)
< 0.0021
, and
Γ(D
+ → K
+ϱ
0(770))
Γ(D
+ → K
−π
+π
+)
< 0.0067
. 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
+)
< 0.08
.
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