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19 April 2024 |
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Rare B Decays at Belle | | H.C. Huang
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17 May 2002 | | Subject: | hep-ex | | Affiliation: | for the Belle Collaboration | | Abstract: | Recent results of rare B decay analyses based on 31.9 million $Bar{B}$ collected with the Belle detector at the KEKB asymmetric $e^+e^-$ collider are presented. We have made the first observation of charmless baryonic decay $B^pm o p ar{p} K^pm$, the three-body $B^0 o K^0 pi^+ pi^-$ and $B^0 o K^0 K^+ K^-$. The measured branching fractions are $mathcal{B}(B^+ o p ar{p} K^+) = (4.3^{+1.1}_{-0.9} pm 0.5) imes 10^{-6}$, $mathcal{B}(B^0{ o}K^0pi^+pi^-) = (rkspp) imes 10^{-6}$, and ${mathcal{B}}(B^0{ o}K^0 K^+ K^-) = (rkskk) imes 10^{-6}$. We also see strong evidence of $B^pm o eta K^pm$ and $B^pm o eta pi^pm$, and observed the decay $B^pm o omega K^pm$ with $mathcal{B}(B^pm o omega K^pm) = (9.9^{+2.7}_{-2.4} pm 1.0) imes 10^{-6}$. Preliminary results of improved measurements of the branching fractions for the decays $B o K pi$ and $pi pi$ are reported. No evidence for direct CP violation is found in the decays $B^pm o K^pm pi^mp$, $K^pm pi^0$, $K^0 pi^pm$, $pi^pm pi^0$, and $omega K^pm$. | | Source: | arXiv, hep-ex/0205062 | | Services: | Forum | Review | PDF | Favorites | |
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