Observation of a Near-threshold $D^0\bar{D}^0π^0$ Enhancement in $B \to D^0\bar{D}^0π^0 K$ Decay

Details Observation of a Near-threshold $D^0\bar{D}^0π^0$ Enhancement in $B \to D^0\bar{D}^0π^0 K$ Decay Observation of a Near-threshold $D^0\bar{D}^0π^0$ Enhancement in $B \to D^0\bar{D}^0π^0 K$ Decay

2006-06-25

arxiv.org/abs/hep-ex/0606055v1

Phys.Rev.Lett.97:162002,2006

Physics

High Energy Physics

High Energy Physics - Experiment

Comments: 9 pages, 2 figures, KEK Preprint 2006-16, Belle Prerpint 2006-19, submitted to PRL

Scientific paper

10.1103/PhysRevLett.97.162002

We report the first observation of a near-threshold enhancement in the $D^0\bar{D}^0\pi^0$ system from $B \to D^0\bar{D}^0\pi^0 K$ decays using a 414 $\mathrm{fb}^{-1}$ data sample collected at the $\Upsilon(4S)$ resonance. The enhancement peaks at a mass $M=3875.4 \pm 0.7_{-2.0}^{+1.2}$ MeV/$c^2$ and the branching fraction for events in the peak is \Br ($B \to D^0\bar{D}^0\pi^0 K$)=(1.27 $\pm$ 0.31 $_{-0.39}^{+0.22})$ $\times$ $10^{-4}$. The data were collected with the Belle detector at the KEKB energy-asymmetric $e^+e^-$ collider.

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