arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.5028hep-ph
收藏

用光前夸克模型和QCD因子分解方法研究Bc介子的非轻子两体衰变

Non-leptonic two-body decays of the Bc meson in light-front quark model and QCD factorization approach

Ho-Meoyng Choi, Chueng-Ryong Ji

摘要:

我们用QCD因式分解方法研究了非轻子二体$B_c\to(D_{(s)},η_c,B_{(s)})+F$衰变过程中的$F$(赝标或矢量介子)。非轻子衰变振幅与介子衰变常数和半轻子$B_c$衰变形状因子的乘积有关。作为获得大量非轻子$B_c$衰变分支比的输入,我们使用半轻子$B_c\to(D_{(s)},η_c,B_{(s)})$衰变在整个运动学区域的弱形状因子和从我们以前的光阵面夸克模型获得的未测量的介子衰变常数。我们比较了我们的分支比与其他理论研究的结果。

英文摘要:

We study exclusive non-leptonic two-body $B_c\to(D_{(s)},η_c,B_{(s)})+F$ decays with $F$(pseudoscalar or vector meson) being factored out in QCD factorization approach. The non-leptonic decay amplitudes are related to the product of meson decay constants and the form factors for semileptonic $B_c$ decays. As inputs in obtaining the branching ratios for a large set of non-leptonic $B_c$ decays, we use the weak form factors for the semileptonic $B_c\to(D_{(s)},η_c,B_{(s)})$ decays in the whole kinematical region and the unmeasured meson decay constants obtained from our previous light-front quark model. We compare our results of the branching ratios with those of other theoretical studies.

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。

↑