Measurements of the branching fractions of exclusive charmless B meson decays with eta ' or omega mesons

作者：Aubert B^*; Boutigny D; Gaillard JM; Hicheur A; Karyotakis Y; Lees JP; Robbe P; Tisserand V; Palano A; Chen GP; Chen JC; Qi ND; Rong G; Wang P; Zhu YS; Eigen G; Reinertsen PL; Stugu B; Abbott B; Abrams GS; Borgland AW; Breon AB; Brown DN; Button Shafer J; Cahn RN; Clark AR; Gill MS; Gritsan A; Groysman Y; Jacobsen RG; Kadel RW; Kadyk J; Kerth LT; Kluth S; Kolomensky YG; Kral JF; LeClerc C; Levi ME; Liu T; Lynch G; Meyer AB; Momayezi M; Oddone PJ

来源：Physical Review Letters, 2001, 87(22): art. no.-221802.

DOI：10.1103/PhysRevLett.87.221802

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).

• 出版日期2001-11-26
• 单位中国地震局