Measurement of the D+ --> pi+ pi0 and D+ --> K+ pi0 Branching Fractions

Details Measurement of the D+ --> pi+ pi0 and D+ --> K+ pi0 Branching Fractions Measurement of the D+ --> pi+ pi0 and D+ --> K+ pi0 Branching Fractions

2006-05-14

arxiv.org/abs/hep-ex/0605044v2

Phys.Rev.D74:011107,2006

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 5 postscript figures

Scientific paper

10.1103/PhysRevD.74.011107

We present measurements of the branching fractions for the Cabbibo suppressed decays D+ --> pi+ pi0 and D+ --> K+ pi0 based on a data sample corresponding to an integrated luminosity of 124.3 fb-1. The data were taken with the BABAR detector at the PEP-II B Factory operating on and near the Y(4S) resonance. We find BR(D+ --> pi+ pi0) = (1.22 +/- 0.10 +/- 0.08 +/- 0.08) * 10^(-3) and BR(D+ --> K+ pi0) = (2.46 +/- 0.46 +/- 0.24 +/- 0.16) * 10^(-4), where the first uncertainty is statistical, the second systematic and the last error is due to the uncertainties in the absolute branching fraction scale for D+ mesons. This represents the first observation of the doubly Cabibbo-suppressed D+ --> K+ pi0 decay mode and an improved measurement of the D+ --> K+ pi0 branching fraction.

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