J. Bartelt et al., STUDIES OF THE CABIBBO-SUPPRESSED DECAYS D-]PI(0)L(+)NU AND D+-]ETA-E(+)NU(E)(), Physics letters. Section B, 405(3-4), 1997, pp. 373-378
Using 4.8 fb(-1) of data taken with the CLEO II detector, the branchin
g fraction for the Cabibbo suppressed decay D+ --> pi(0) iota(+)nu mea
sured relative to the Cabibbo favored decay D+ --> K-0 iota(+)nu is fo
und to be 0.046 +/- 0.014 +/- 0.017. Using upsilon cs and upsilon cd f
rom unitarity constraints, we determine \f(+)(pi)(0)\f(+)(K)(0)\(2) =
0.9 +/- 0.3 +/- 0.3. We also present a 90% confidence level upper limi
t for the branching ratio of the decay D+ --> eta(+)nu(c) relative to
that for D+ --> pi(0)e(+)nu(e) of 1.5. (C) 1997 Published by Elsevier
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