A measurement of the Cabibbo-suppressed decays
D0 --> pi+ pi- and
D0 --> K+ K-
by P.L. Frabetti et al.
Abstract.
We report a measurement of the relative branching ratio of two
Cabibbo-suppressed
decay modes: D0 --> pi+ pi- and D0 --> K+ K-.
The data were accumulated in the 1990-1991
fixed target run of Fermilab high energy photoproduction
experiment E687 . The branching ratios of these modes relative to
the Cabibbo-allowed decay D0 --> K- pi+ are also presented.
The relative branching
ratios are measured to be :
Gamma(D0 -->KK) / Gamma(D0 -->pi pi)
= 2.53 +- 0.46 +- 0.19,
Gamma(D0 -->KK) / Gamma(D0 --> K pi)
= 0.109 +- 0.007 +- 0.009, and
Gamma(D0 --> pi pi) / Gamma(D0 -->
K pi) = 0.043 +- 0.007 +- 0.003.