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arXiv 0906.2177hep-ex
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B -> K ~*(892)γ衰变的分支分数和CP及同位旋不对称性的测量

Measurement of Branching Fractions and CP and Isospin Asymmetries in B -> K*(892) gamma Decays

The BABAR Collaboration, B. Aubert

摘要:

我们提出了一个分析的衰变B 0-> K*0伽马和B+ -> K*+伽马使用样本的3.83亿BBbar事件收集的BaBar探测器在PEP 2不对称能量B工厂。我们测得分支分数BF[B 0-> K*0 Gamma] = 4.47 +/- 0.10 +/- 0.16 x 10^-5,BF[B+ -> K*+ Gamma] = 4.22 +/- 0.14 +/- 0.16 x 10^-5。我们将直接CP不对称性限制为-0.033 < Acp < 0.028,将等平线不对称性限制为0.017 < \Delta 0- < 0.116,其中限值在90%置信区间确定,并包括两个统计系统不确定性。

英文摘要:

We present an analysis of the decays B0 -> K*0 gamma and B+ -> K*+ gamma using a sample of 383 million BBbar events collected with the BaBar detector at the PEP2 asymmetric energy B factory. We measure the branching fractions BF[B0 -> K*0 Gamma] = 4.47 +/- 0.10 +/- 0.16 x 10^-5 and BF[B+ -> K*+ Gamma] = 4.22 +/- 0.14 +/- 0.16 x 10^-5. We constrain the direct CP asymmetry to be -0.033 < Acp < 0.028 and the isopin asymmetry to be 0.017 < \Delta0- < 0.116, where the limits are determined at the 90% confidence interval and include both statistical systematic uncertainties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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