Measurements Of The Branching Fractions Of Exclusive Charmless B Meson Decays With Eta ' Or Omega Mesons

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PHYSICAL REVIEW LETTERS（2001）

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摘要

We present the results of searches for B decays to charmless two-body final states containing eta' or omega mesons, based on 20.7 fb(-1) of data collected with the BABAR detector. We find the branching fractions B(B+ --> eta' K+) = (70 +/- 8 +/- 5) x 10(-6), B(B-o --> eta' K-o) = (42(-11)(+13) +/- 4) x 10(-6) and B(B+ --> omega pi (+)) = (6.6(-1.8)(+2.1) +/- 0.7) x 10(-6), where the first error quoted is statistical and the second is systematic. We give measurements of four additional modes for which the 90% confidence level upper limits are B(B+ --> eta' pi (+)) < 12 x 10(-6), B(B+ --> omegaK(+)) < 4 x 10(-6), B(B-o --> omegaK(o)) < 13 x 10(-6), and B (B-o --> omega pi (o)) < 3 x 10(-6).

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