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arXiv 0705.1798hep-ex
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B ~+->phi K ~*(892)~+衰变的振幅分析

Amplitude Analysis of the B+- ->phi K*(892)+- Decay

The BABAR Collaboration, B. Aubert

摘要:

我们用BABAR探测器记录的约3.84亿个BBbar对的样本对B+- -> phi(1020)K*(892)+-衰变进行了振幅分析。总共测量了12个参数,包括纵向f_L和奇偶奇横向f_perp振幅的分数、分支分数、强相位和对CP破坏敏感的6个参数。我们使用JP=1-和0+ Kpi分量之间的干涉的Kpi不变质量的依赖性来解决在强和弱相位的确定中的离散模糊性。我们的测量值f_L=0.49+-0.05+-0.03,f_perp=0.21+-0.05+-0.02,强相位表明存在一个目前未知源的螺旋度加振幅。

英文摘要:

We perform an amplitude analysis of B+- -> phi(1020) K*(892)+- decay with a sample of about 384 million BBbar pairs recorded with the BABAR detector. Overall, twelve parameters are measured, including the fractions of longitudinal f_L and parity-odd transverse f_perp amplitudes, branching fraction, strong phases, and six parameters sensitive to CP-violation. We use the dependence on the Kpi invariant mass of the interference between the JP=1- and 0+ Kpi components to resolve the discrete ambiguity in the determination of the strong and weak phases. Our measurements of f_L=0.49+-0.05+-0.03, f_perp=0.21+-0.05+-0.02, and the strong phases point to the presence of a substantial helicity-plus amplitude from a presently unknown source.

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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