Study of three-body charmless B decays
Study of three-body charmless B decays
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DOI：
10.1103/physrevd.65.092005
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发表时间：
2002-01
影响因子：
5
通讯作者：
A. Garmash;E. al.
中科院分区：
文献类型：
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作者：
A. Garmash;E. al.
我们报告了基于Belle探测器收集的29.1 fb^{-1}数据样本的三体无粲衰变B+ => K+h+h-$的研究。在不假设中间机制的情况下，首次测量了以下三体分支分数：Br(B+ => K+pi-pi+) = (55.6\pm5.8\pm7.7)x10^{-6}和Br(B+ => K+K-K+) = (35.3\pm3.7\pm4.5)x10^{-6}。我们首次观测到B+ => f_0(980)K+的分支分数积为Br(B+ => f_0(980)K+)xBr(f_0(980) => \pi+\pi-)= (9.6^{+2.5+1.5+3.4}_{-2.3-1.5-0.8})x10^{-6}。这是第一个报道的B介子衰变到标量伪标量终态的例子。我们还报道了B+ => K*(892)^0 pi+衰变的首次观测结果，其分支分数为Br(B+ => K*(892)^0 pi+) = (19.4^{+4.2+2.1+3.5}_{-3.9-2.1-6.8})x10^{-6}。
We report on a study of three-body charmless decays B+ => K+h+h-$ based on a 29.1 fb^{-1} data sample collected with the Belle detector. With no assumptions on the intermediate mechanisms, the following three-body branching fractions have been measured for the first time: Br(B+ => K+pi-pi+) = (55.6\pm5.8\pm7.7)x10^{-6} and Br(B+ => K+K-K+) = (35.3\pm3.7\pm4.5)x10^{-6}. We present the first observation of the decay B+ => f_0(980)K+ with a branching fraction product of Br(B+ => f_0(980)K+)xBr(f_0(980) => \pi+\pi-)= (9.6^{+2.5+1.5+3.4}_{-2.3-1.5-0.8})x10^{-6}. This is the first reported example of a B meson decay to a scalar pseudoscalar final state. We also report the first observation of B+ => K*(892)^0 pi+ decay with a branching fraction of Br(B+ => K*(892)^0 pi+) = (19.4^{+4.2+2.1+3.5}_{-3.9-2.1-6.8})x10^{-6}.