Observation of a Significant Excess of Pi0pi0 Events in B Meson Decays.
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Neal
Physical review letters（2003）
引用 16|浏览510
摘要
We present a study of the decay B-0-->pi(0)pi(0) based on a sample of 124x10(6) B (B) over bar pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-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 B(B-0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B-0 and (B) over bar (0) decays.
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