Observation of the Decay $B^{0} \to π^{0}π^{0}$

Details Observation of the Decay $B^{0} \to π^{0}π^{0}$ Observation of the Decay $B^{0} \to π^{0}π^{0}$

2003-08-05

arxiv.org/abs/hep-ex/0308012v1

Phys.Rev.Lett.91:241801,2003

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 8 postscript figues, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.91.241801

We present an observation of the decay $B^{0} \to \pi^{0} \pi^{0}$ based on a sample of 124 million $B\bar{B}$ pairs recorded by the BABAR detector at the PEP-II asymmetric-energy $B$ Factory at SLAC. We observe $46 \pm 13 \pm 3$ events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction $\BR(B^{0} \to \pi^{0} \pi^{0}) = (2.1 \pm 0.6 \pm 0.3) \times 10^{-6}$, averaged over $B^{0}$ and $\bar{B}^{0}$ decays.

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