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arXiv 2201.06881hep-ph
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$B \to D KK$衰变中的共振$ρ(1450)^+$和$ρ(1700)^+$

Resonances $ρ(1450)^+$ and $ρ(1700)^+$ in $B \to D KK$ decays

Ai-Jun Ma, Wen-Fei Wang

摘要:

用微扰QCD因式分解方法分析了衰变$B^+ \to \bar{D}^0 K^+ \bar{K}^0$、$B^0 \to D^- K^+ \bar{K}^0$和$B_s^0 \to D_s^-K^+ \bar{K}^0$中中间态$ρ(1450)^+$和$ρ(1700)^+$对K介子对的贡献.本文中所有相关衰变的衰变振幅都由具有K介子对发射的可因子化Feynman图所支配,并且带电$ρ$介子在相关三体$B$衰变的$KK$通道中应该是非常重要的.此外,这些准二体衰变是CKM的青睐,和相关的分支比被预测为$10^{-5}$的顺序,这有可能被测量的实验。根据Belle提出的三体总分支分数,我们还发现子过程$ρ(1450, 1700)^+ \to KK$对三体$B$介子衰变的贡献是相当大的.因此,衰变$B^+ \to \bar{D}^0 K^+ \bar{K}^0$、$B^0 \to D^- K^+ \bar{K}^0$和$B_s^0 \to D_s^-K^+ \bar{K}^0$可用于研究LHCb和Belle-II实验中$ρ(1450)$和$ρ(1700)$的性质。

英文摘要:

The contributions for the kaon pair from the intermediate states $ρ(1450)^+$ and $ρ(1700)^+$ in the decays $B^+ \to \bar{D}^0 K^+ \bar{K}^0$, $B^0 \to D^- K^+ \bar{K}^0$, and $B_s^0 \to D_s^-K^+ \bar{K}^0$ are analyzed within the perturbative QCD factorization approach. The decay amplitudes for all concerned decays in this work are dominated by the factorizable Feynman diagrams with the emission of the kaon pair, and the charged $ρ$ mesons should be of great importance in the $KK$ channel of the related three-body $B$ decays. Moreover, these quasi-two-body decays are CKM-favored, and the relevant branching ratios are predicted to be in the order of $10^{-5}$, which have the potential to be measured by experiments. It is also shown that the contributions of the subprocesses $ρ(1450, 1700)^+ \to KK$ for the three-body $B$ meson decays are considerable according to the total three-body branching fractions presented by Belle. Therefore, the decays $B^+ \to \bar{D}^0 K^+ \bar{K}^0$, $B^0 \to D^- K^+ \bar{K}^0$, and $B_s^0 \to D_s^-K^+ \bar{K}^0$ can be employed to study the properties of $ρ(1450)$ and $ρ(1700)$ in the LHCb and Belle-II experiments.

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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