Evidence for B0->pi0pi0

Details Evidence for B0->pi0pi0 Evidence for B0->pi0pi0

2003-08-15

arxiv.org/abs/hep-ex/0308040v4

Phys.Rev.Lett.91:261801,2003

Physics

High Energy Physics

High Energy Physics - Experiment

Submitted to PRL

Scientific paper

10.1103/PhysRevLett.91.261801

We report evidence for the decay B0->pi0pi0. The analysis is based on a data sample of 152million BBbar pairs collected at the Upsilon(4s) resonance with the Belle detector at the KEKB e+e- storage ring. We find 25.6+9.3/-8.4(stat)+1.6/-1.4(syst) B0->pi0pi0 signal events with a significance of 3.4 standard deviations. We measure the branching fraction to be (1.7+-0.6(stat)+-0.2(syst))*10^{-6}.

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