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arXiv 1402.5280hep-ph
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微扰QCD中三体$B$衰变的直接CP不对称性

Direct CP asymmetries of three-body $B$ decays in perturbative QCD

Wen-Fei Wang, Hao-Chung Hu, Hsiang-nan Li, Cai-Dian Lü

摘要:

基于微扰QCD方法,我们提出了一个分析三体强子$B$介子衰变的理论框架。关键的非微扰输入是末态的两强子分布振幅,其涉及的类时形状因子和再散射相位与相关实验数据相吻合。再加上$b$ -夸克衰变核的短距离强相位,我们能够预测直接CP不对称性,例如,$B^\pm \to π^+ π^- π^\pm$和$π^+π^-K^\pm$模式,这与LHCb数据在相空间的各种局部区域一致。我们的形式主义的其他三体强子和辐射$B$介子衰变的应用被提及。

英文摘要:

We propose a theoretical framework for analyzing three-body hadronic $B$ meson decays based on the perturbative QCD approach. The crucial nonperturbative input is a two-hadron distribution amplitude for final states, whose involved time-like form factor and rescattering phase are fit to relevant experimental data. Together with the short-distance strong phase from the $b$-quark decay kernel, we are able to make predictions for direct CP asymmetries in, for example, the $B^\pm \to π^+ π^- π^\pm$ and $π^+π^-K^\pm$ modes, which are consistent with the LHCb data in various localized regions of phase space. Applications of our formalism to other three-body hadronic and radiative $B$ meson decays are mentioned.

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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