Cabibbo-Suppressed Decays of D^+ \to π^+π^0, K^+\bar{K}^0, K^+π^0

Details Cabibbo-Suppressed Decays of D^+ \to π^+π^0, K^+\bar{K}^0, K^+π^0 Cabibbo-Suppressed Decays of D^+ \to π^+π^0, K^+\bar{K}^0, K^+π^0

2003-09-22

arxiv.org/abs/hep-ex/0309065v1

Phys.Rev.D69:071102,2004

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, submitted to PRL

Scientific paper

10.1103/PhysRevD.69.071102

Using a 13.7 fb-1 data sample collected with the CLEO II and II.V detectors, we report new branching fraction measurements for two Cabibbo-suppressed decay modes of the D+ meson: BR(D+ -> pi+ pi0) = (1.31 +/- 0.17 +/- 0.09 +/- 0.09) x 10^(-3)and BR(D+ -> K+ K0bar) = (5.24 +/- 0.43 +/- 0.20 +/- 0.34) x 10^(-3) which are significant improvements over past measurements. The errors reflect statistical and systematical uncertainties as well as the uncertainty in the absolute D+ branching fraction scale. We also set the first 90% confidence level upper limit on the branching fraction of the doubly Cabibbo-suppressed decay mode BR(D+ -> K+ pi0) < 4.2 x 10^(-4).

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