Measurement of the Absolute Branching Fraction of D0 --> K- pi+

Details Measurement of the Absolute Branching Fraction of D0 --> K- pi+ Measurement of the Absolute Branching Fraction of D0 --> K- pi+

2007-04-16

arxiv.org/abs/0704.2080v2

Phys.Rev.Lett.100:051802,2008

Physics

High Energy Physics

High Energy Physics - Experiment

Revtex4, 7 pages, 2 figures, accepted by Physical Review Letters

Scientific paper

10.1103/PhysRevLett.100.051802

We measure the absolute branching fraction for D0 --> K- pi+ using partial reconstruction of B0bar --> D^{*+} X \ell^{-} \bar{\nu}_{\ell} decays, in which only the charged lepton and the pion from the decay D^{*+} --> D0 pi^+ are used. Based on a data sample of 230 million B Bbar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we obtain the absolute branching fractions of D0 --> K- pi+ = (4.007 \pm 0.037 \pm 0.072)%, where the first uncertainty is statistical and the second is systematic.

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