Evidence for B0->pi0pi0

et al; The Belle Collaboration: S.H.Lee

arxiv: hep-ex/0308040 · v4 · submitted 2003-08-15 · ✦ hep-ex

Evidence for B0->pi0pi0

The Belle Collaboration: S.H.Lee , et al This is my paper

classification ✦ hep-ex

keywords pi0pi0evidencestatsystanalysisbbbarbellebranching

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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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