Observation of a Significant Excess of \u3c00\u3c00 Events in B Meson Decays
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Publication date
January 2003
DOI Publisher
American Physical Society (APS)Abstract
We present a study of the decay B0\u2192\u3c00\u3c00 based on a sample of 124 710^6 BB\u305 pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46\ub113\ub13 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(B0\u2192\u3c00\u3c00)=(2.1\ub10.6\ub10.3) 710-6, averaged over B0 and B\u305 0 decays
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