arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0803.1073hep-phhep-ex
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在微扰QCD方法中,$B(B_s)\to D_{(s)} P$、PDMATHAAB、$D_{(s)}^{*}P$和$D_{(s)}^{*}V$衰减

The $B(B_s)\to D_{(s)} P$, $D_{(s)} V$, $D_{(s)}^{*}P$ and $D_{(s)}^{*}V$ decays in the perturbative QCD approach

Run-Hui Li, Cai-Dian Lü, Hao Zou

摘要:

用微扰QCD方法研究了两体非轻子粲衰变$B_{(s)} \to D_{(s)}P$,$D_{(s)}^*P$,$D_{(s)}V$和$D_{(s)}^*V$,其中$P$和$V$分别表示轻赝标介子和矢量介子.我们用$χ^2$方法对六个$B\to DP$通道的实验数据进行了拟合,检验了$D$介子波函数。我们给出了所有的B衰变通道的分支比,其中大部分与实验惊人地一致。预测的$B_s$衰变可以面对未来的实验数据。通过简单的计算,我们的pQCD方法给出了正确的相对强相的$a_2/a_1$与实验。我们还预测了$B_{(s)} \to D^* V$衰变通道中横向极化的百分比。

英文摘要:

Two-body non-leptonic charmed decays $B_{(s)} \to D_{(s)}P$, $D_{(s)}^*P$, $D_{(s)}V$ and $D_{(s)}^*V$ are analyzed in perturbative QCD approach, where $P$ and $V$ denote the light pseudoscalar meson and vector meson, respectively. We test the $D$ meson wave function by a $χ^2$ fit with experimental data of six $B\to DP$ channels. We give the branching ratios of all the charmed B decay channels, most of which agree with experiments amazingly well. The predicted $B_s$ decays can be confronted with the future experimental data. By straightforward calculations, our pQCD approach gives the right relative strong phase of $a_2/a_1$ with experiments. We also predict the percentage of transverse polarizations in $B_{(s)} \to D^* V$ decay channels.

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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