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Observation of B+→a1+(1260)K0 and B0→a1-(1260)K+

Aubert, B. et al. (2008) Observation of B+→a1+(1260)K0 and B0→a1-(1260)K+. Physical Review Letters, 100 (5). 051803. ISSN 0031-9007

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We present branching fraction measurements of the decays B+→a1+(1260)K0 and B0→a1-(1260)K+ with a1±(1260)→π∓π±π±. The data sample corresponds to 383×106 BB̅ pairs produced in e+e- annihilation through the Υ(4S) resonance. We measure the products of the branching fractions B(B+→a1+(1260)K0)B(a1+(1260)→π-π+π+)=(17.4±2.5±2.2)×10-6 and B(B0→a1-(1260)K+)B(a1-(1260)→π+π-π-)=(8.2±1.5±1.2)×10-6. We also measure the charge asymmetries Ach(B+→a1+(1260)K0)=0.12±0.11±0.02 and Ach(B0→a1-(1260)K+)=-0.16±0.12±0.01. The first uncertainty quoted is statistical and the second is systematic.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
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Depositing User: Sharon Beastall
Date Deposited: 04 Jan 2012 08:55
Last Modified: 28 Aug 2021 11:12


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