论文标题
KAON对的贡献来自$ρ（770）$的三体衰减$ b \ d k \ bar {k} $
Contributions of the kaon pair from $ρ(770)$ for the three-body decays $B \to D K\bar{K}$
论文作者
论文摘要
我们通过采用扰动QCD方法来研究三体衰变$ b \ bar {k} $的KAON对的贡献。根据这项工作的预测，对于三体衰减，例如$ b^0 \ to \ bar {d}^0 k^+ k^ - $，$ b_s^0 \ to \ b^0 k^0 \ to \ b^0 k^0 k^0 k^0 k^0 k^+ k^ - $ k^ - b_^+ k^+， $ 20 \％$的三体分支分数中的$ b^+ \ to \ bar {d}^0 k^+ \ bar {k}^0 $可能来自子程序$ρ（770）^+ \ to K^+ bar {k}^0 $。我们还将分支分数估计为$ρ（770）^\ pm $ $ $ $ pm衰减为$ 1 \％$，而对于中性$ρ（770）$衰减到$ k^+k^ - $ k^ - $ k^ - $ k^ - $ k^0 \ bar {k} 0 \ bar {k}^0 $ to y 0.5 $ $ 0.5 \％$ $ $ $ $，未来可以实验。
We study the contributions of the kaon pair originating from the resonance $ρ(770)$ for the three-body decays $B \to D K\bar{K}$ by employing the perturbative QCD approach. According to the predictions in this work, the contributions from the intermediate state $ρ(770)^0 $ are relatively small for the three-body decays such as $B^0 \to \bar{D}^0 K^+ K^-$, $B_s^0 \to \bar{D}^0 K^+ K^-$, and $B^+ \to D_s^+ K^+K^-$, while about $20\%$ of the total three-body branching fraction for $B^+ \to \bar{D}^0 K^+ \bar{K}^0$ could possibly come from the subprocess $ρ(770)^+\to K^+ \bar{K}^0$. We also estimate the branching fractions for $ρ(770)^\pm$ decay into the kaon pair to be about $1\%$, and that for the neutral $ρ(770)$ decay into $K^+K^-$ or $K^0\bar{K}^0$ to be about $0.5\%$, which will be tested by future experiments.
